I never use raging strikes unless tank I'm safely in yellow or tank really knows what he's doing.

It's called "Raging Strikes" for a reason.

I.E. It makes tanks rage when you take aggro from them. Or it makes healers rage because they actually have to heal you. Or it makes other DPS rage because now they're doing < 1/2 the damage your doing...

Eventually, it makes you rage because your PUG is depressed that they're not better then you, and quit the dungeon without saying anything.