The last rune bonus on Superior Rune of Flame Legion (burning 20%) doesn’t update the Ranger’s flame trap burning duration unless Trap Potency is equipped in the Skirmishing trait line.
Burning and Bonfire (torch offhand) also seem unaffected by the rune. Traiting Offhand Training has no effect. The 2nd rune 10% bonus works regardless.
I don’t know if this is a tool tip issue or not. It appears the duration does not increase on enemies.
(Not that I will use trap potency anymore if it means losing spotter, but that’s another issue
)