Psy's are annoying, but, wizards can 1 hit almost everything with a simple aoe cast or a combination of debuffs(genie) and a m agic throw skill. I choose wizard, because it's more fun to play, it can kill everything pretty fast and can get a very high atk lvl, which will help very much into everything. They don't have much stunning skills but that won't be a problem if u get a good distanse with it, ur enemy will be down before it reaches u. (Of course, those things will happen if u know how to roll a wiz, if u know good combos and know what to use and when)