Keep a trait when it strengthens the unit's real job; reroll only when the upgrade target is clear.
Help an Anime Origins player complete the specific task owned by /traits with a direct, current, source-labelled answer.
For a main damage dealer, prioritize damage, cooldown, crit, or a passive that matches its attack pattern. For farm units, income matters more; for support units, range or cooldown can be the better keep. Community guides currently place Immortal, Ascendant, and Overseer among the strongest damage-oriented outcomes, but balance changes can move that order.