Paladin and Shaman are godly in Arena because Arena is all about mass top tier minions and these two classes are all about the minion massing. Paladin and Shaman have a ton of buff cards to keep their minions alive and trade well. Mage is also similar thanks to the 1 damage hero power and their mass removals/freezes but you need some luck to get the good shit.
Hunter are awful in arena for sure. Priest depends a lot, if you get a low of removals and that spell that turns your hero power into a nuke then you will own otherwise you will get owned. Warrior/Rogue are in a similar spot, Mid tier-ish. Warlock and Druids are also luck dependent.
Hunter are awful in arena for sure. Priest depends a lot, if you get a low of removals and that spell that turns your hero power into a nuke then you will own otherwise you will get owned. Warrior/Rogue are in a similar spot, Mid tier-ish. Warlock and Druids are also luck dependent.