Quote Originally Posted by CreinCrein View Post
Except the tank's dps doesn't go down. Tomahawk/shield lob/Unmend hit before the regen tick goes off and there's absolutely no way to grab hate in savage scenarios off a single regen unless the tank is terrible. In all situations pre-pull regens is the most optimal way to start a pull, just depends on how good a tank is at timing their aggro skills.
Most of us are talking about dungeon trash pulls, not O4S.

Tomahawk gets ONE mob. And as soon as I tag that mob, the other two start heading for the healer. I'm not wasting my steel cyclone on two mobs. So now I have to stop the pull's momentum, line up overpower for those two stray mobs or hope two tomahawks will work, then keep going to the next group by which point the dps are going ham on the mobs because they think I'm done with the pull.

It's awkward. It's unnecessary. Don't do it with randos. It may seem more efficient to the healer who's doing it, but it's usually much messier and more inefficient than what healing they thought they'd be saving with a regen.