LegionBound Advanced Builds: Late-Game Class Chains (2026)

Updated 2026-10-22: Correction: an earlier version said Warrior, Sorcerer and Witch give three active synergies (Witch's Hexer needs a Cleric, so that trio gives two), that Knight, Smith, Guardian and Shield Mage give four (Shield Mage needs a Battlemage, so three), that Barbarian plus Tax Collector activates Berserker (Berserker needs a Brawler; that pair gives Tax Collector its Strongarm), that Rogue plus Duelist activates Fencer (Fencer needs a Gunslinger), and that the Protagonist needs heroes "from different groups" (it needs three other synergy heroes). Stat priorities by Ascension tier, item-state merge rules, wave timings and skill-tree effects had no source and are cut. The guide now builds on the community class tables, three developer answers, the Patch 1.1 notes and the official trailer, and the images are frames from that trailer.

Key takeaways

• A run of neighbouring classes in one loop gives one synergy fewer than its length; a closed loop gives one per hero
• Ascended heroes don't count as synergy partners, so only ascend promoted heroes nobody on your field learns from
• Keystones are tied to hero types (the trailer shows DEX and MAG keystones and three keystone slots), so pick a chain whose heroes share a type
• Full XP stops at 10 heroes; at 50 it's divided by up to 5.0, per the developer
• Our top chains: the Tax Collector loop (four for four), Samurai to Swashbuckler for Dexterity, Warrior to Cleric for Magic, Knight to Battlemage for Defense
• The Patch 1.1 heroes add a ten-class loop and a two-hero Valkyrie pair

How promotion works (the rules every build rests on)

A hero promotes into its synergy class when its prerequisite partner is on the field. Klokinator's Class Synergy/Promotion Guide puts it simply: "Heroes can Synergize when their prerequisite partner is present on the field." The Hero Class Guide lists one partner per class, and the partner's own synergy form counts too: Warrior needs "Sorcerer or Warlock".

The partners chain into loops. The Hero Synergy Groups guide splits the launch roster into a Warrior group of 14, a Barkeep group of 11 and a Tax Collector group of 4, each "a loop of dependencies that eventually closes itself". In plain terms: Warrior learns from Sorcerer, Sorcerer from Witch, Witch from Cleric, and so on round the circle until Lumberjack learns from Warrior.

That gives you the one piece of arithmetic that matters for builds. Field a run of neighbours from a loop and every hero except the last one promotes. Five neighbours, four synergies. Close the whole loop and everyone promotes.

Two exceptions:

• Ascended heroes don't count as partners. Klokinator again: "Ascended Heroes do NOT count toward synergizing other units." If your Warrior needs a Sorcerer, "Only a tier 1 or 2 Sorceror will work!" Ascend the hero at the head of a chain (the first one in the table rows below, whom nobody learns from), not the middle.
• The Peasant sits outside the loops. Its synergy class, Protagonist, needs "Three Other Synergy Heroes" in the class guide. Two Protagonists ascend into the True Legend, which, per Klokinator, "cannot benefit from DEX/MAG/DEF skill tree keystones, only STR ones."

Synergies per slot: the chains worth building

Here's every chain we'd build toward, with the hero types from the class guide. We picked runs where most heroes share a type, because that's what keystones and the Patch 1.1 stat items reward (next section).

The Tax Collector loop and the Valkyrie pair are the only places where every hero promotes, which is why we'd still slot the Tax Collector four into a late build even when the main chain lives elsewhere. The Valkyries are a skill-tree talent unlock ("The Valkyries (5000 Skill Gems)" in the class guide), so they're a late-account option rather than a first-run one.

Common misreads we see: Warrior, Sorcerer and Witch is two synergies, not three (Witch learns from Cleric). Barbarian next to Tax Collector promotes the Tax Collector, not the Barbarian (Barbarian learns from Brawler). Rogue next to Duelist promotes the Rogue only (Duelist learns from Gunslinger).

Image: LegionBound release trailer on Steam (Spicy Garlic Games). Ricochet Shot is a Dexterity keystone; the counter at top right shows three keystone slots.

Build around one hero type

Every class in the class guide carries a type: Strength, Dexterity, Magic or Defense. Three things in the game key off that type, and they're the reason we'd rather run five Dexterity neighbours than five random ones:

• Keystones. The official trailer shows the skill tree's keystones: Ricochet Shot ("DEX heroes attacks bounce up to 2 times") and Arcane Replication (MAG abilities with a 50% chance to duplicate onto another target), with a "Keystones Active" counter out of three. Klokinator's note that the True Legend only benefits from STR keystones confirms the same split for Strength.
• Patch 1.1's stat items. The Volatile Elements notes say the four XP items "have been reworked to instead give bonus stats to the corresponding hero types".
• Your own spells. Developer Zakreon says player spells "are affected by your MAG heroes MAG stat". A Magic chain makes your cast spells better too.

So pick the keystones first, then the chain. Dexterity keystones point at Samurai through Swashbuckler. Magic keystones point at the Warrior-to-Cleric run, where Sorcerer, Witch and Cleric are all Magic heroes. Defense points at Knight to Battlemage.

Party size: the XP split

LegionBound lets you field up to 50 heroes, but more isn't free. Asked whether XP is shared, developer Zakreon answered: "10 or less heroes it's full xp for all. Then as you go higher it divides by up to 5.0 for a full 50 heroes."

In the same thread he says shop prices "scale based on the generated hero's level and stats, which is based on the average party hero level", so the shop tracks how levelled your party is, not just how far into the run you are.

Our read: the first ten slots go to the heroes you want levelled fastest, which means your main chain. Past that, every extra hero should earn its place with a synergy, not just fill a row.

Late-run Ascension: what to merge and when

Klokinator's guide notes that "around wave 80, you might start seeing buyable Ascended units in the shop", and that in a typical 100-wave run "you might Ascend at most 5 units". Five merges in a hundred waves isn't many, which is another reason to spend them on chain ends rather than partners. The Ascension guide covers the merge screen and the preview Patch 1.1 added.

Wave 100 matters for another reason: since Patch 1.1, "Endless mode can now be unlocked by reaching Wave 100 in any Battle Mode map."

Rows, kills and statuses

Three developer and patch-note details that change how a late build plays:

• Rows don't protect anyone. Developer Elethia: "The position of the heroes in the row does not make them more or less likely to be targeted." Use rows for your own layout, not as armour for a fragile Magic hero.
• Kill effects follow the last hit. Zakreon says kills go to whoever "caused the kill/last damage", so "thorns, poison, burn, should all give kill stats and effects". A thorns or burn build still triggers your on-kill items.
• Elements combine. Patch 1.1 added three statuses, Brittle, Wet and Oily, "designed to interact with elemental damage". Summons also got "their own independent slots" in the same patch.

Image: LegionBound release trailer on Steam (Spicy Garlic Games). A Challenge run at wave 59 with 24 heroes on the field, well past the ten-hero full-XP line.

Step-by-step: putting a late build together

1. Choose a hero type from your keystones. Look at what's unlocked in your tree and which type it boosts.

2. Pick the chain from the table. Five neighbours of that type gives four synergies. If the shop keeps offering the Tax Collector four, add them as a second, fully promoting block.

3. Fill the first ten slots with the chain. That's where full XP ends.

4. Ascend chain heads only. Before you merge, check whether anyone learns their synergy from that hero. If someone does, pick a different pair. Use the Ascension preview.

5. Add the Peasant last. It needs three other synergy heroes, so it only promotes once your chain is already working.

Our take

The loop arithmetic beats any list of "best three classes": count neighbours, subtract one, and check the types match your keystones. The Tax Collector loop stays in our late builds because it's the one launch block where every hero promotes. And the Ascended-partner rule is the mistake we'd watch for first, because a single merge in the middle of a chain quietly switches off the hero who was learning from it.

Frequently asked questions

What are the best advanced builds in LegionBound? A long run of neighbours from one loop, built around one hero type. Five neighbours give four synergies; the Tax Collector loop gives four from four because it closes on itself.

Do Ascended heroes count for synergy? No. Klokinator's Steam guide says they don't; only a tier 1 or 2 copy of the partner works.

How many heroes should I field? Up to 10 heroes get full XP. Above that XP is divided, up to 5.0 at 50 heroes, per developer Zakreon.

Do keystones matter for builds? Yes. They're tied to hero types, and the trailer shows three keystone slots. Build your main chain from the type your keystones boost.

Where do the Patch 1.1 heroes fit? Ten of them form their own loop and the two Valkyries teach each other, per the community class guide. The Valkyrie pair is a two-for-two block.

Related Reading

• LegionBound Synergy Guide: Launch 30 Classes: every launch class with its partner and synergy class.
• LegionBound Tier List: All 30 Classes: our ranking of the launch roster by loop position.
• LegionBound Ascension Guide: How to Merge Heroes: the merge screen and the Patch 1.1 preview.
• LegionBound Tax Collector Group: All 4 Classes Loop: the closed loop in detail.
• LegionBound Endbringer Guide: the Adventure Mode boss.
• LegionBound complete guide hub: every LegionBound guide in one place.
• LegionBound Warrior Group: All 14 Classes: the 14-class loop behind three of the chains above.
• LegionBound Barkeep Group: All 11 Classes: the loop the Dexterity chain comes from.
• Legionbound Tips and Tricks: First Runs, Rows, Skill Tree: first-run fundamentals before you plan late builds.
• Legionbound Battle Mode Guide: endurance runs, where wave 100 unlocks Endless.
• LegionBound Adventure Mode Guide: buildings, map choices and the Endbringer decision.

References

• LegionBound on Steam: store page; up to 50 heroes, 42 classes; Release Trailer (source of the three images)
• LegionBound 1.1 - Volatile Elements: reworked XP items, Brittle/Wet/Oily, summon slots, Endless at wave 100
• Developer answers thread: XP split, shop prices, kill credit, spell scaling, rows
• Hero Class Guide: Myzri's Steam guide; partner, synergy class, type and unlock for all 42 classes
• Hero Synergy Groups: WillieBillie's Steam guide; the three launch loops
• Class Synergy/Promotion Guide: Klokinator's Steam guide; Ascended heroes and synergy, the True Legend, shop Ascended units