[Midoo]

I'm a Shaman main, it's pretty great. Shamans have some of the best buffs in the game and are in my opinion the most aggressive Priest class. Druids and Clerics can pull their own in a fight but neither of them can top the Shammy's raw ability to kill (malo + dots). But on the other hand excelling with a Shaman takes colossal pp investments; if you want to graduate from "good solo class" to "soloing endgame velious dragon bosses" you need to get your hands on Torpor and Fungi and work on your Epic which can cost a combined total of a couple hundred thousand platinum. Also keep in mind that all Shaman races are either KoS from the rest or isolated from the rest so leaving your starting zone will take tons of effort.

Clerics are the best healing class in the game so if you're mostly thinking of being a support that's what you should pick. They can solo and are very effective against the undead but you'll mostly shine in a group where people need you.

I haven't played a Wizard before but at some point I heard a wiz in a raid can cast every nuke in his spellbook and then AFK for 30 minutes and no one will notice. If you have absolutely nothing on your mind other than pure, raw burst damage (portals to get around are useful but if I wanted a "taxi" class I'd pick Druid instead) then this class is for you. Don't expect to be invited to many leveling groups though.