Got a bard? He can sing for you, you won't need that much. 20 sec will get you to your next invigorate. If he really can't (requiem/ballad), drop ToD yeh.

Ripping hate on the adds? Don't think it has anything to do with your dps. More with the fact you either attack one straight away and he's trying go keep both or you just attack the wrong one. Tab dotting helps you to not pull hate and it's a tiny bit more dps which is always nice.