Also, if mages give you problems, I suggest spending some time dueling mages 1v1. And watch other people duel them, you'll learn their tricks and how to counter them.

As a ele shaman with decent gear, you should be able to beat mages 1v1. It just takes well timed stone claws, wind shears and grounding totems, and knowing when to trinket.

e.g. put a grounding totem down right before you are about to heal yourself so you don't get counter spelled. Stone claw or trinket to avoid a deadly shatter combo etc...