I (resto shammy) run tons of heroics a day for farming rep with my (prot warrior) friend. Our ideology is roll need on anything and everything you can! Hunter legs drop I'm resto off spec elemental I still roll need. Do I care if the hunter rages... nope just a silly dps. Rule of the thumb is if you don't mind being kicked as a dps or if you are heals or tank go ahead and roll on all BoE's and BoP's a little gold in the pocket never hurt anyone. Not like you're ever going to group with them again.