Spend first
Main carry, evolved unit, high-DPS secret, or current event unit that you are already upgrading.
Anime Vanguards
Trait Rerolls are easiest to waste right after code drops. Pick one account-defining unit first, then reroll only when the unit will actually be used.

Spend Trait Rerolls on a unit only when three things are true: the unit is on your main team, the unit helps a mode you are actively clearing, and the trait upgrade changes real performance. Do not spend rerolls just because a unit is new, shiny, or mentioned in a tier list.
Main carry, evolved unit, high-DPS secret, or current event unit that you are already upgrading.
Fresh pull with no materials, filler Mythic, trade-only copy, or unit you are testing for one stage.
Use the unit database and DPS calculator before rerolling. A trait on the wrong unit is still a wasted resource.
These are not automatic reroll targets. They are high-value entries from the current seed database that deserve a check before spending rerolls.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
Top-end seed DPS entry. Verify passives and upgrade path before treating it as a universal best unit.
High seed DPS entry for shortlist testing in the calculator.
Update 13 codes include Trait Reroll rewards. Claim them, then wait until you know which unit is carrying Story, Infinite, Rift, Boss Rush, or Pirate Dynasty. The reroll decision should follow the account plan, not the other way around.