Only four of the 10 Whiteout Survival experts matter for fighting: Romulus (command and rally), Valeria (State of Power SvS), Gareth (general combat) and Fabian (Foundry and Tundra Hellfire). At max level Gareth gives Lethality and Health +30% and, with Porcupine and Undefeated Will at level 20, up to +50% Defense and +50% Health; Romulus gives +20% Lethality and Health plus +10% from Last Line and Spirit of Aeetes; Valeria gives +30% Attack and Defense and +30% Lethality and Health in the SvS battle phase. All 10 experts maxed together give +65% Attack, +115% Defense, +110% Lethality and +160% Health in every battle. Data from the official wiki, October 2026.
How experts work
- Level stat: each expert adds a Troops' stat that grows with expert level up to level 100 (+15% for most, +20% for Romulus and Valeria, +30% for Gareth, +10% for Baldur).
- Affinity and advancement: expert levels are raised with affinity and advancement items.
- Talent and skills: every skill has a scope. Only some apply in every battle; many work only in one event (SvS battle phase, Foundry and Tundra Hellfire, Arena, Bear Hunt, Frostfire, Trade Route) or are non-combat. Skills level up with EXP and books.
- Rally rule: the game states that in rally battles only the four most proficient skills of the Captains are effective.
- Stacking: expert bonuses are Special Bonuses added into the same Attack, Defense, Lethality and Health pools as pets, gems and gear.
All 10 experts at a glance
Values are the maximum values from the official Whiteout Survival Wiki (October 2026).
| Expert | Title | Level stat at Lv100 | Works in |
|---|---|---|---|
| Romulus | Military Advisor | Lethality +20%, Health +20% | Rally and all battles |
| Valeria | High Marshal | Lethality +20%, Health +20% | State of Power (SvS) |
| Gareth | Ironthorn Chief | Lethality +30%, Health +30% | All battles |
| Fabian | Master of Arms | Lethality +15%, Health +15% | Foundry and Tundra Hellfire |
| Holger | Arena Legend | Attack +15%, Defense +15% | Arena |
| Baldur | Negotiator | Attack +10%, Defense +10% | Alliance economy |
| Ronne | Convoy Queen | Attack +15%, Defense +15% | Tundra Trade Route |
| Kathy | Mining Specialist | Lethality +15%, Health +15% | Frostfire Mine |
| Cyrille | Bear Huntress | Attack +15% | Bear Hunt |
| Agnes | Elite Politician | Defense +15% | Intel and economy |
Romulus: Military Advisor
Level stat at Lv100: Lethality +20%, Health +20%. Reaching level 100 takes 939,960 affinity and 1,820 advancement items in total. Works in: Rally and all battles.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Call of War | Free recruitment of 150 to 600 high-level troops per camp per day and 1 to 10 Loyalty Tags | Lv10 | 279,600 | 2,700 | Non-combat |
| Last Line | Troops' Attack and Defense +0.5% to +10% | Lv20 | 1,728,000 | 10,000 | All battles |
| Spirit of Aeetes | Troops' Lethality and Health +0.5% to +10% | Lv20 | 2,980,800 | 15,000 | All battles |
| One Heart | Rally Capacity +5,000 to +100,000 | Lv20 | 3,369,600 | 15,000 | Rallies |
| Commander's Crest (talent) | Expedition Army size +300 to +10,000 | Lv11 | by affinity | - | All battles |
Valeria: High Marshal
Level stat at Lv100: Lethality +20%, Health +20%. Reaching level 100 takes 1,571,080 affinity and 1,100 advancement items in total. Works in: State of Power (SvS).
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Well Prepared | SvS Preparation Phase points +2% to +20% and up to +3 bonus tiers | Lv10 | 388,800 | 4,500 | SvS preparation |
| Radiant Honor | Sunfire Tokens on medal rewards up to +50 and up to +3 State of Power shop items | Lv10 | 544,200 | 4,500 | SvS economy |
| Battle Concerto | All troops' Lethality and Health up to +30% | Lv20 | 2,073,600 | 15,000 | SvS battle phase |
| Crushing Force | Rally Capacity up to +150,000 | Lv20 | 2,332,800 | 15,000 | SvS battle phase |
| Conqueror's Spirit (talent) | All troops' Attack and Defense +2% to +30% in the State of Power battle phase | Lv11 | by affinity | - | SvS battle phase |
Gareth: Ironthorn Chief
Level stat at Lv100: Lethality +30%, Health +30%. Reaching level 100 takes 2,561,350 affinity and 2,730 advancement items in total. Works in: All battles.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Gifts of Iron | Ironwrought Chests: 1 to 3 per 100 troops trained, daily cap 6 to 30 | Lv10 | 232,800 | 2,700 | Non-combat |
| Porcupine | Troops' Defense +1% to +50% | Lv20 | 3,456,000 | 25,000 | All battles |
| Undefeated Will | Troops' Health +1% to +50% | Lv20 | 3,888,000 | 25,000 | All battles |
| Fearsome Reputation | Enemy Troops' Lethality -0.25% to -5% | Lv20 | 15,206,400 | 80,000 | All battles |
| Rallying Cry (talent) | Infirmary Capacity +50,000 to +200,000 and healing speed +3% to +50% | Lv11 | by affinity | - | All battles |
Fabian: Master of Arms
Level stat at Lv100: Lethality +15%, Health +15%. Reaching level 100 takes 854,450 affinity and 660 advancement items in total. Works in: Foundry and Tundra Hellfire.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Salvager | Arsenal Tokens +10% to +100% | Lv10 | 232,800 | 2,700 | Non-combat |
| Crisis Rescue | Instant recovery of 100,000 to 1,000,000 troops per Foundry Battle and Tundra Hellfire | Lv10 | 483,600 | 4,500 | Foundry and Hellfire |
| Heightened Firepower | Lethality and Health +1.5% to +30% in Foundry Battle and Tundra Hellfire | Lv20 | 705,000 | 5,100 | Foundry and Hellfire |
| Battle Bulwark | Rally Capacity +7,500 to +150,000 in Foundry Battle and Tundra Hellfire | Lv20 | 1,104,000 | 7,100 | Foundry and Hellfire |
| Craftsman of War (talent) | All troops' Attack and Defense +2% to +30% in Foundry Battle and Tundra Hellfire | Lv11 | by affinity | - | Foundry and Hellfire |
Holger: Arena Legend
Level stat at Lv100: Attack +15%, Defense +15%. Reaching level 100 takes 513,070 affinity and 440 advancement items in total. Works in: Arena.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Arena Elite | Arena heroes' Attack and Health +2% to +20% | Lv10 | 746,400 | 5,400 | Arena |
| Crowd Pleaser | Daily and weekly Arena Tokens +5% to +50% | Lv10 | 279,600 | 2,700 | Arena |
| Arena Star | 0 to 3 extra Arena Shop items at a 5% to 50% discount | Lv10 | 279,600 | 2,700 | Arena |
| Legacy | Heroes' Attack and Health +2% to +20% in the Arena | Lv10 | 746,400 | 5,400 | Arena |
| Blade Dancing (talent) | Audience reward chance 50% to 100% and 1 to 3 Arena Star Chests | Lv11 | by affinity | - | Arena |
Baldur: Negotiator
Level stat at Lv100: Attack +10%, Defense +10%. Reaching level 100 takes 342,380 affinity and 330 advancement items in total. Works in: Alliance economy.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Blazing Sunrise | Alliance Mobilization points +20% and up to +3 bonus tiers | Lv10 | 232,800 | 2,700 | Alliance |
| Honored Conquest | Alliance Championship Badges +50% and up to +3 shop items | Lv10 | 232,800 | 2,700 | Alliance |
| Bounty Hunter | Crazy Joe points +50% and a bonus chest per 200,000 points (limit 10 per season) | Lv10 | 232,800 | 2,700 | Alliance |
| Dawn Hymn | Alliance Showdown points +50% (except Tundra Trade Route) and up to +3 bonus tiers | Lv10 | 466,200 | 4,500 | Alliance |
| Master Negotiator (talent) | Alliance Shop prices -15% and Personal Activity Triumph Chest rewards +100% | Lv11 | by affinity | - | Alliance |
Ronne: Convoy Queen
Level stat at Lv100: Attack +15%, Defense +15%. Reaching level 100 takes 513,070 affinity and 440 advancement items in total. Works in: Tundra Trade Route.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Cartographic Memory | Arrival time +2% to +20% faster and 1 to 3 more free refreshes per truck | Lv10 | 232,800 | 2,700 | Trade Route |
| Treasure Scent | 10% to 100% chance of raiding 1 extra cargo | Lv10 | 326,400 | 2,700 | Trade Route |
| Giving Back | 5% to 50% chance of recovering 1 cargo when raided, plus 0 to 2 Elite Guardbox escorts | Lv10 | 746,400 | 5,400 | Trade Route |
| Gold Class | A Legendary escort mission after every 12 down to 4 completed missions | Lv10 | 1,679,400 | 10,800 | Trade Route |
| Trade Dominion (talent) | Troops' Attack and Defense +2% to +30% when her caravan is raided or when attacking trucks | Lv11 | by affinity | - | Trade Route |
Kathy: Mining Specialist
Level stat at Lv100: Lethality +15%, Health +15%. Reaching level 100 takes 769,270 affinity and 550 advancement items in total. Works in: Frostfire Mine.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Icefire Hunter | Extra XP from Mine Patrols +5% to +50% for Frostfire skill upgrades | Lv10 | 232,800 | 2,700 | Frostfire |
| Valorous Cold | Troop capacity +5,000 to +50,000 and hero recovery after defeat 6% to 60% faster | Lv10 | 326,400 | 2,700 | Frostfire |
| Winter Treasures | 6 to 60 additional Charm Designs at 200,000 Orichalcum | Lv10 | 1,243,800 | 9,000 | Frostfire |
| Efficient Mining | 500 to 5,000 Orichalcum per minute and 10 to 100 extra Charm Guides | Lv10 | 1,679,400 | 10,800 | Frostfire |
| Child of Frost (talent) | Troops' Lethality and Health +2% to +30% in Frostfire Mine battles | Lv11 | by affinity | - | Frostfire |
Cyrille: Bear Huntress
Level stat at Lv100: Attack +15%. Reaching level 100 takes 171,690 affinity and 275 advancement items in total. Works in: Bear Hunt.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Entrapment | Bear Hunt Rally Capacity +30,000 to +300,000 | Lv10 | 32,400 | 630 | Bear Hunt |
| Scavenging | 1 to 5 x100 Enhancement XP Components per Bear Hunt | Lv5 | 220,800 | 3,200 | Bear Hunt |
| Weapon Master | Essence Stones from Bear Hunt +1 to +5 | Lv5 | 345,600 | 4,000 | Bear Hunt |
| Ursa's Bane | Bear Hunt Troops Deployment capacity +3,000 to +30,000 | Lv10 | 93,000 | 900 | Bear Hunt |
| Earthbreaker (talent) | Bear Hunt damage points +2% to +30% (self only) | Lv11 | by affinity | - | Bear Hunt |
Agnes: Elite Politician
Level stat at Lv100: Defense +15%. Reaching level 100 takes 206,020 affinity and 275 advancement items in total. Works in: Intel and economy.
| Skill | Effect (level 1 to max level) | Max skill level | EXP to max | Books to max | Works in |
|---|---|---|---|---|---|
| Efficient Recon | 2 to 8 extra Intel missions per day | Lv5 | 345,600 | 4,000 | Non-combat |
| Optimization | Storehouse Chief Stamina gain +10 to +40 | Lv5 | 276,000 | 3,200 | Non-combat |
| Project Management | Construction time reduced by 2 to 8 hours on every new build | Lv5 | 110,400 | 1,600 | Non-combat |
| Covert Knowledge | 20 to 120 extra Mystery Badges per daily mission and 1 to 4 free Mystery Shop refreshes | Lv10 | 93,000 | 900 | Non-combat |
| Earthbreaker (talent) | 1 to 5 Seeker Chests per 120 gathering minutes, daily cap 10 to 30 | Lv11 | by affinity | - | Non-combat |
Which upgrade gives the most battle value
Same method as the pets guide: x points added to a stat pool change the strength ratio by about x / (100 + pool). Typical pools in real SvS castle reports (13 reports from October 2026): Attack about 2,600%, Defense 2,100%, Lethality 1,800%, Health 1,900%. The table lists each combat skill at its maximum level and its cost.
| Skill at max level | Battle strength gained | EXP to max | Books to max | Works in |
|---|---|---|---|---|
| Valeria: Battle Concerto | +3.08% | 2,073,600 | 15,000 | SvS battle phase |
| Fabian: Heightened Firepower | +3.08% | 705,000 | 5,100 | Foundry and Hellfire |
| Gareth: Undefeated Will | +2.50% | 3,888,000 | 25,000 | All battles |
| Valeria: Conqueror's Spirit (talent) | +2.47% | by affinity | - | SvS battle phase |
| Fabian: Craftsman of War (talent) | +2.47% | by affinity | - | Foundry and Hellfire |
| Gareth: Porcupine | +2.27% | 3,456,000 | 25,000 | All battles |
| Romulus: Spirit of Aeetes | +1.03% | 2,980,800 | 15,000 | All battles |
| Romulus: Last Line | +0.82% | 1,728,000 | 10,000 | All battles |
| Gareth: Fearsome Reputation | +0.26% | 15,206,400 | 80,000 | All battles |
Level stats are worth more than any single skill: Gareth's +30% Lethality and Health is about +3.08%, Romulus's and Valeria's +20% about +2.05% each. Takeaways: Gareth's Undefeated Will and Porcupine give the most in every battle, Romulus's Spirit of Aeetes and Last Line come next, Valeria's skills are the best for State vs State, and Fearsome Reputation costs 15,206,400 EXP for only -5% enemy Lethality.
Level stat by expert level
Level stat grows almost linearly from level 1 to level 100.
| Expert | Lv1 | Lv25 | Lv50 | Lv75 | Lv100 |
|---|---|---|---|---|---|
| Romulus | 2.10% | 6.10% | 11.00% | 15.10% | 20.00% |
| Valeria | 2.10% | 6.10% | 11.00% | 15.10% | 20.00% |
| Gareth | 3.15% | 9.15% | 16.50% | 22.65% | 30.00% |
| Fabian | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
| Holger | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
| Baldur | 1.05% | 3.05% | 5.50% | 7.55% | 10.00% |
| Ronne | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
| Kathy | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
| Cyrille | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
| Agnes | 1.58% | 4.58% | 8.25% | 11.33% | 15.00% |
What all 10 experts give at max
All experts at level 100 with the general (all battle) skills at max: level stats of every expert, Romulus's Last Line and Spirit of Aeetes, and Gareth's Porcupine, Undefeated Will and Fearsome Reputation.
| Stat | Maximum from all 10 experts (all battles) |
|---|---|
| Troops' Attack | +65% |
| Troops' Defense | +115% |
| Troops' Lethality | +110% |
| Troops' Health | +160% |
| Enemy Lethality (Fearsome Reputation) | -5% |
| Rally Capacity (One Heart) | +100,000 |
| Expedition Army size (Commander's Crest) | +10,000 |
| Healing Speed / Infirmary Capacity (Rallying Cry) | +50% / +200,000 |
Extra in the SvS battle phase only (Valeria): all troops Attack and Defense +30% (talent), Lethality and Health +30% (Battle Concerto) and Rally Capacity +150,000 (Crushing Force). Extra in Foundry and Tundra Hellfire only (Fabian): Attack and Defense +30%, Lethality and Health +30%, Rally Capacity +150,000.
Using expert bonuses in the planner
The battle predictor has inputs for Romulus (affinity, Last Line, Spirit of Aeetes, One Heart), Valeria (Conqueror's Spirit, Battle Concerto, Crushing Force) and Gareth (Porcupine, Undefeated Will, Fearsome Reputation). If you paste exact stats from a battle report, those already include your expert bonuses.
Frequently asked questions
Which Whiteout Survival experts matter for combat?
Romulus (rally and general combat), Valeria (SvS battle phase), Gareth (general combat) and Fabian (Foundry and Tundra Hellfire). Holger is for Arena, Cyrille for Bear Hunt, Kathy for Frostfire, Ronne for the Trade Route, and Baldur and Agnes are mostly economy.
What are the maximum stats of each expert?
At level 100: Gareth Lethality and Health +30%, Romulus and Valeria +20%, Fabian and Kathy +15% Lethality and Health, Holger and Ronne +15% Attack and Defense, Cyrille +15% Attack, Agnes +15% Defense, Baldur +10% Attack and Defense.
Do expert skills work in every battle?
No. Each skill has a scope. Last Line, Spirit of Aeetes, Porcupine, Undefeated Will and Fearsome Reputation work in all battles. Valeria's talent and skills work in the SvS battle phase only, and Fabian's only in Foundry Battle and Tundra Hellfire.
How many expert skills count in a rally?
The game states that in rally battles only the four most proficient skills of the Captains are effective.
Which expert upgrade is best per cost?
Gareth's Undefeated Will and Porcupine give up to +50% Health and Defense in every battle. Valeria's Conqueror's Spirit and Battle Concerto give +30% Attack and Defense and +30% Lethality and Health, but only in SvS.
Is Fearsome Reputation worth upgrading?
It lowers the enemy's Lethality by up to 5% at level 20, which is worth about 0.26% of battle strength, and the skill costs 15,206,400 EXP and 80,000 books. It is the lowest value upgrade per cost among the combat experts.
Related guides
Attack each garrison · Joiners guide · Bear Trap formations · 60/40/0 formation · Garrison defense · Troop ratio guide · Sunfire Castle · Pricing · Pets · Method and how to cite · Rally planner
Computed by the WOS Formations planner (a model): full hero roster of the generation, equal gear, T11 troops without Fire Crystal. Baseline answers, not guarantees. Last updated 2026-10-07. Cite as WOS Formations, https://wosformations.com.