Originally Posted by
Un0
It is a guaranteed hit, therefore there is no "chance to proc it" as you say. I can agree that it might be less optimal than a aoe move but it will on each spellcast/melee hit proc spellweave, thus unless almost all the adds are dead it will give you more dps from spamming fel flame than gooing back to primary target, given of course that the adds have not yet reached the boss. If they and you are close enough to the boss then you should obviously proceed with a normal rotation on the primary target.