Riddle Me This: "Regen on pulls is bad"

[tinythinker]

Regen will pull hate off the tank. Once it starts ticking and restoring HP, that generates enmity and pulls the mobs toward you. Often times the tank doesn't have time to Flash/Overpower/Unleash/etc before Regen starts ticking so mobs fly all over the screen.

OK, that makes sense. Like I said I am new so I figured there was something I was missing. Didn't seem to be a problem, and in prior runs in DF people actually suggested that what White Mages do is to put regen on the tank, hit Cleric Stance, and load some DoTs/use Holy/fire Stones/etc, so I thought I was doing it right. Thanks for the insight!