Originally Posted by
Nikkaszal
Priest and Shaman are two fairly crap classes for Arena though. Priest has very few solid minions that can be played "vanilla" (eg don't need to be combod with anything to get max effect. Water Elemental is one of the best examples) and poor removal for Arena. Shaman, on the other hand, has way too much of its core tied up in common/rare/epic to be effective. Its only truly usable weapon is an epic. Its board clear is rare. Feral Spirit is rare. ALL of its nuke spells are common or better. This reduces the chance you'll draft them over, say, a mage who gets Fbolt/Fball/Fstrike all as basics with a higher draft chance.
Mage, Paladin, Druid and Warlock are the most effective Arena classes. As mentioned above, Mage gets most of its good shit from basics which is why they always seem to have six billion fireballs and flamestrikes when you face them. Druids get insane minions with KotG, DotC and the Ancients, as well as solid minion buffs to improve trades. Paladins have a lot of tools to keep their minions sticking to the board with divine shield/BOK etc. Warlocks draw cards forever, and draw wins games.
The other classes are a crapshoot.