Season 2 Engineer & War Leader Skill Tree — Point Allocation
What This Is
A point-by-point allocation reference for Season 2 (level cap Lv 70, roughly 75 skill points — confirm your exact total in-game). Each skill shows the recommended Assign / Max and a Priority. Fill ⭐ Max-first skills before anything else — on their own they already run to about your whole Lv 70 budget; Then is where extra Skill-Point consumables go; Optional is off-role or situational, safe to skip on a focused build.
For which profession to run and when to switch, see the Profession System Guide. Short version:
Season just started → run Engineer (growth phase). Spend one Profession Change Certificate to switch to War Leader when the war phase begins (Desert Storm, Capital Conquest, SvS, Faction Duel). Switching resets your points, so plan one clean switch per season. The permanent tree is the same every season — only the seasonal column below swaps — so this allocation reuses beyond S2 with a different seasonal set.
Season 2 Seasonal Column (shared — "Polar World")
The right-column skills are identical for Engineer and War Leader and refund at season end. Unlike the permanent trees (free-select, level-gated), the seasonal column is a single linear chain — each skill gates the next, so you cannot skip any of them. You must take Winter Wonderland (even though it's just a cosmetic base skin) to reach Double Exchange and everything after. Because it all refunds at season end, this costs you nothing long-term — just spend down the chain in order, putting real value into the EXP-snowball skills (Combat Experience, Building Inspiration I, Double Exchange, Professional Insights — they multiply your profession EXP) and the frost combat skills, and only the minimum 1 point into the two gate nodes (Winter Wonderland, Gather for Warmth).
| # | Skill | Unlock | Assign | Max | Notes |
|---|---|---|---|---|---|
| 1 | Combat Experience | Lv 1 | 3 | 3 | ⭐ EXP snowball |
| 2 | Building Inspiration I | Lv 10 | 3 | 3 | ⭐ EXP snowball |
| 3 | Winter Wonderland | Lv 15 | 1 | 1 | Gate — must take (base skin) |
| 4 | Double Exchange | Lv 25 | 3 | 3 | ⭐ EXP snowball |
| 5 | Firebomb | Lv 30 | 3 | 3 | Frost combat |
| 6 | Professional Insights | Lv 35 | 5 | 5 | ⭐ EXP snowball |
| 7 | Intense Overdrive | Lv 40 | 3 | 3 | Utility |
| 8 | Gather for Warmth | Lv 45 | 1 | 1 | Gate (utility) |
| 9 | Frostbomb | Lv 55 | 3 | 3 | Frost combat |
| 10 | Frost Mine | Lv 60 | 3 | 3 | Frost combat |
Confirmed in-game and in the game data: the seasonal skills form one prerequisite chain (each node unlocks the next in the order above), so there is no "skip the cosmetic" option — you take all ten in sequence. That's fine, because seasonal points refund at season end. So the only real decision is how many points to sink into each: max the EXP and frost skills, and drop just the 1 required point into Winter Wonderland / Gather for Warmth to pass through.
Point-Spend Order — Tier by Tier
Tiers unlock purely by profession level (two skills every 5 levels), so you spend top-to-bottom as you climb. The permanent order is the same whether or not you have this season's refundable skills — what changes is where your early and "skip"-tier points go. Two routes, same end build:
Route A · No seasonal items (pure permanent). Every point goes into the permanent tree in the order below. On the "— skip —" tiers, hold your points until the next priority tier unlocks — don't sink them into the off-role skills.
Route B · With seasonal items (recommended while levelling). Spend **down the seasonal chain in order** (it's linear — see above), maxing the EXP-snowball skills as they unlock (Combat Experience Lv 1 → Building Inspiration I Lv 10 → Double Exchange Lv 25 → Professional Insights Lv 35) to reach the cap faster, and put every "— skip —" tier point into that chain instead of holding it. It all refunds at season end, so you respec into exactly Route A's build at the cap.
The permanent order below is shared by both routes. "Core" = running total of the permanent priority build — it fills in over the whole climb and lands ≈ 70 of your ~75 Lv 70 budget.
Engineer (growth) — spend down the tree in this order:
| Prof. Lv | Spend on (→ max) | Core |
|---|---|---|
| Lv 1 | Rapid Production (5) | 5 |
| Lv 5 | Extra Meal (1) | 6 |
| Lv 10 | Build for Free (5) → Research for Free (5) | 16 |
| Lv 15 | Build Now (5) → Research Now (5) | 26 |
| Lv 20 | — skip (Rally Rush, Siege Banner) | 26 |
| Lv 25 | Friendly Aid (5) | 31 |
| Lv 30 | Cooperative Construction (2) → Cooperative Research (2) | 35 |
| Lv 35 | Resource-Saving (5) → Recycling (5) | 45 |
| Lv 40 | — skip (Medical Aid, Buddy Shield) | 45 |
| Lv 45 | — skip (Drone Supply, Fearless Defense) | 45 |
| Lv 50 | — skip (Random Visitors, Durability Mine) | 45 |
| Lv 55 | — skip (One More, Support Boost) | 45 |
| Lv 60 | Efficient Gathering (5) → First Aid Expert (5) | 55 |
| Lv 65 | Master Builder (5) (skip Battlefield Cleanup) | 60 |
| Lv 70 | Instant Gathering (5) → Monster Tracking (5) | 70 |
War Leader (combat) — spend down the tree in this order:
| Prof. Lv | Spend on (→ max) | Core |
|---|---|---|
| Lv 1 | — later: Immediate Return / Unit Mobilization | 0 |
| Lv 5 | Drill Ground Prep (5) → Hospital Prep (5) | 10 |
| Lv 10 | Craze (5) (Urgent Cure = later) | 15 |
| Lv 15 | Winning Pursuit (5) → Intensive Training (5) | 25 |
| Lv 20 | — later: Warfare Supplies (skip March in Badlands) | 25 |
| Lv 25 | Inspire (5) (Garrison Haste = later) | 30 |
| Lv 30 | Team Strike (5) (skip Disguise) | 35 |
| Lv 35 | Tactical Garrison (5) → Garrison Boost (5) | 45 |
| Lv 40 | — skip (Decay Ray, Charge Banner) | 45 |
| Lv 45 | Hold the Base (5) → Rally Guard (5) | 55 |
| Lv 50 | Base Strike (5) (skip Destruction Mine) | 60 |
| Lv 55 | — later: Hyper War Fever / Rally Vanguard | 60 |
| Lv 60 | — later: Efficient Training (skip Riot Control) | 60 |
| Lv 65 | Combat Raider (5) (skip Banner Upgrade) | 65 |
| Lv 70 | Assault Squad (5) (Provocation = later) | 70 |
The "later" picks (Immediate Return, Unit Mobilization, Urgent Cure, Warfare Supplies, Garrison Haste, Hyper War Fever, Rally Vanguard, Efficient Training, Provocation) round the build past the ~70-point core — take them once the core is maxed, funded by refunded seasonal points (Route B) and Skill-Point consumables. On Route A, the War Leader Lv 1 point simply waits, or goes to Immediate Return since nothing higher-priority is unlocked yet.
Engineer — Permanent Core (30 skills)
Growth and economy: faster building, research and resources. Two skills unlock every 5 levels (Lv 1–70). Max the build/research/gather engine first; the siege and combat skills on the right are off-role for a growth build. Priority build ≈ 70 points.
| Skill | Unlock | Assign | Max | Priority |
|---|---|---|---|---|
| Rapid Production | Lv 1 | 5 | 5 | ⭐ Max first |
| Outstanding Contribution | Lv 1 | — | 1 | Optional |
| Extra Meal | Lv 5 | 1 | 1 | Then |
| Siege Mastery | Lv 5 | — | 5 | Optional |
| Build for Free | Lv 10 | 5 | 5 | ⭐ Max first |
| Research for Free | Lv 10 | 5 | 5 | ⭐ Max first |
| Build Now | Lv 15 | 5 | 5 | ⭐ Max first |
| Research Now | Lv 15 | 5 | 5 | ⭐ Max first |
| Rally Rush | Lv 20 | — | 5 | Optional |
| Siege Banner | Lv 20 | — | 1 | Optional |
| Siege Inspiration | Lv 25 | — | 3 | Optional |
| Friendly Aid | Lv 25 | 5 | 5 | Then |
| Cooperative Construction | Lv 30 | 2 | 2 | ⭐ Max first |
| Cooperative Research | Lv 30 | 2 | 2 | ⭐ Max first |
| Resource-Saving | Lv 35 | 5 | 5 | ⭐ Max first |
| Recycling | Lv 35 | 5 | 5 | ⭐ Max first |
| Medical Aid | Lv 40 | — | 5 | Optional |
| Buddy Shield | Lv 40 | — | 3 | Optional |
| Drone Supply | Lv 45 | — | 5 | Optional |
| Fearless Defense | Lv 45 | — | 5 | Optional |
| Random Visitors | Lv 50 | — | 5 | Optional |
| Durability Mine | Lv 50 | — | 5 | Optional |
| One More | Lv 55 | — | 5 | Optional |
| Support Boost | Lv 55 | — | 5 | Optional |
| Efficient Gathering | Lv 60 | 5 | 5 | ⭐ Max first |
| First Aid Expert | Lv 60 | 5 | 5 | Then |
| Battlefield Cleanup | Lv 65 | — | 5 | Optional |
| Master Builder | Lv 65 | 5 | 5 | ⭐ Max first |
| Instant Gathering | Lv 70 | 5 | 5 | ⭐ Max first |
| Monster Tracking | Lv 70 | 5 | 5 | Then |
War Leader — Permanent Core (30 skills)
Military and combat: rally/troop damage, garrison defence, training speed. Two skills unlock every 5 levels (Lv 1–70). Max the attack line (Craze, Winning Pursuit, Team Strike, Inspire, Base Strike, Combat Raider, Assault Squad) plus training (Drill Ground Prep, Intensive Training) and garrison (Tactical Garrison, Garrison Boost, Hold the Base, Rally Guard) for war weeks. Priority build ≈ 70 points.
| Skill | Unlock | Assign | Max | Priority |
|---|---|---|---|---|
| Immediate Return | Lv 1 | 5 | 5 | Then |
| Unit Mobilization | Lv 1 | 5 | 5 | Then |
| Drill Ground Prep | Lv 5 | 5 | 5 | ⭐ Max first |
| Hospital Prep | Lv 5 | 5 | 5 | ⭐ Max first |
| Craze | Lv 10 | 5 | 5 | ⭐ Max first |
| Urgent Cure | Lv 10 | 5 | 5 | Then |
| Winning Pursuit | Lv 15 | 5 | 5 | ⭐ Max first |
| Intensive Training | Lv 15 | 5 | 5 | ⭐ Max first |
| March in Badlands | Lv 20 | — | 2 | Optional |
| Warfare Supplies | Lv 20 | 5 | 5 | Then |
| Inspire | Lv 25 | 5 | 5 | ⭐ Max first |
| Garrison Haste | Lv 25 | 5 | 5 | Then |
| Team Strike | Lv 30 | 5 | 5 | ⭐ Max first |
| Disguise | Lv 30 | — | 1 | Optional |
| Tactical Garrison | Lv 35 | 5 | 5 | ⭐ Max first |
| Garrison Boost | Lv 35 | 5 | 5 | ⭐ Max first |
| Decay Ray | Lv 40 | — | 1 | Optional |
| Charge Banner | Lv 40 | — | 1 | Optional |
| Hold the Base | Lv 45 | 5 | 5 | ⭐ Max first |
| Rally Guard | Lv 45 | 5 | 5 | ⭐ Max first |
| Base Strike | Lv 50 | 5 | 5 | ⭐ Max first |
| Destruction Mine | Lv 50 | — | 5 | Optional |
| Hyper War Fever | Lv 55 | 5 | 5 | Then |
| Rally Vanguard | Lv 55 | 5 | 5 | Then |
| Riot Control | Lv 60 | — | 5 | Optional |
| Efficient Training | Lv 60 | 5 | 5 | Then |
| Combat Raider | Lv 65 | 5 | 5 | ⭐ Max first |
| Banner Upgrade | Lv 65 | — | 1 | Optional |
| Assault Squad | Lv 70 | 5 | 5 | ⭐ Max first |
| Provocation | Lv 70 | 5 | 5 | Then |
FAQ
Should I run Engineer or War Leader?
Run Engineer during the build-up (growth) phase, then spend one Profession Change Certificate to switch to War Leader for the war phase (Desert Storm, Capital Conquest, SvS, Faction Duel).
Can I skip skills in the seasonal column?
No — the seasonal column is a single linear chain, so you must take each skill to unlock the next (even the cosmetic ones). It all refunds at season end, so spend down the chain freely.
Do I need an Exclusive Weapon to raise skills?
Skills cap at level 30 without an Exclusive Weapon; levels 31–40 require EW (the cap is 30 + floor(EW/3)).
Does the permanent tree change each season?
No — the permanent Engineer and War Leader trees are the same every season (30 skills each, two per five levels up to Lv 70). Only the level cap and the seasonal column change.
Notes
- Assign levels are a recommended priority build, not a hard rule — tune to your alliance's war schedule and your spending. Max-first ≈ your Lv 70 budget; the rest needs Skill-Point consumables.
- Combat Experience and Professional Insights are seasonal-only — they are not in the permanent tree; they appear only while the season is active.
- Source: both permanent trees were captured directly in-game (S2, Lv 70) and every skill, level and max double-checked in-game — game-accurate (30 skills each, two per 5 levels). Assign levels and priorities are a recommended build — confirm point totals in your client.
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