Chief Expansion · Set Bonuses
Troop priority matters, but Chief Gear has another layer: matching-quality pieces unlock bonuses for all three troop types. That means the best-looking individual upgrade is not always the best next upgrade for the account.
3 matching pieces
Get three Chief Gear pieces to the qualifying gear tier and the 3-piece track advances your Infantry, Lancer and Marksman Defense bonus. Higher qualifying gear tiers raise the percentage. That makes the third piece across a threshold especially important.
6 matching pieces
Get all six Chief Gear pieces to the qualifying gear tier and the 6-piece track advances your Infantry, Lancer and Marksman Attack bonus. This is the game's strongest nudge toward bringing the whole set along.
What the game actually shows
3-piece Defense example
Epic T1 is active at 3/3 for +6.00%. The next Mythic Defense bonus is waiting at 2/3, so one more qualifying Mythic piece advances the all-troop Defense track.
6-piece Attack example
Epic T1 is active at 6/6 for +6.00%. The next Mythic Attack bonus is still at 2/6, so the entire set has to reach that tier before the all-troop Attack track advances.
That is the important part: the lower-tier bonus stays active until enough pieces qualify for the next threshold. Your first two pieces toward a new tier can strengthen their own troop lines, the third also advances the all-troop Defense track, and pieces four through six work toward the next all-troop Attack bonus.
The practical rule
You can still move Lancer, Infantry or Marksman first. The important question is what that choice costs you. If one more upgrade finishes a 3-piece or 6-piece threshold, compare the account-wide bonus against the benefit of pushing your preferred troop line again.
This is also why “keep everything perfectly identical” is too simplistic. You are managing breakpoints, not arranging six matching picture frames.
Three common situations
Close to 3
If the third qualifying piece is within reach, advancing the all-troop Defense bonus deserves serious weight before another specialization upgrade.
Close to 6
If one or two lagging pieces are all that stand between you and the next 6-piece Attack bonus, catching them up can beat making your strongest line even stronger.
Far from either
When no useful set breakpoint is close, you have more freedom to choose the troop pair that best fits your formation, event goal or account plan.
Frost rule
A Lancer-heavy player can still be Lancer-heavy while finishing a set threshold. A balanced player can still push Infantry first inside a new tier. Set progression and troop specialization are two decisions that have to work together.