My Monk, Warrior, and Ranger get the same message all the time. Don't feel Shammys are the only ones.
The only thing more annoying is the stun proc which seems to be resisted by almost every mob in the game except for a couple mobs in the newbie zones. hehe
Warrior 2.0 is a group buff, if you are tanking it will only work if TGB is off. Monk shouldn't matter, but I haven't checked the proc resist rate. For some reason with Warrior 2.0 you can not cast it on yourself. You must have someone else target.
As for the Epic Power resist... only -10 mod vs. -300 mod on panther maw, same with monk 2.0 buff proc.
Both of these should have the resist mod to match or exceed panthers resist.
Shaman AND Monk (and maybe other classes?) should have their clicky buffs checked to make sure the added proc resist mod is in line with other procs (-10 vs. -300)