The leather working crafted item, Flaring Cowl, does not do its intended damage per the Equip tooltip. At item level 399 it states, “While in combat, you are wrapped in an intense heat which burns nearby foes for 1,110 Fire damage every 3 sec.” This is consistent only against one target, but as soon as two or more targets are around you the damage drops.
With two hostile targets, it is hitting for ~700 damage a tick and only ~400 damage a tick on a five target cleave.