Summer ResurrectionFollow

I'm planning on picking up WoW again after a hiatus that started last summer. I'm probably only going to play for the summer then cancel my account when my fall semester starts up again (getting close to graduation, lots of work to do.) But I miss the game and would like to do some casual 5 man raids and stick mostly to pvp stuff. I'll be trying to level up aswell but i'm mostly looking to pvp.

just wondering if it's worth it to start my mage up again since this is the type of gameplay i want to do, or if i should be playing a different class. Am i going to need epic gear to have a good time in pvp? or can i survive and have fun with some blues and skill?