I'm playing a DE wizard on the new PVP Server, Nagafen... And I LOVE IT. Sure spells get resisted.. they should. They are app1! But I'm already dropping people in just a few shots, it's silly.. I always run around with a guild group on teamspeak together.. and we just destroy people. Tank gets up and taunts people. I drop some nukes, and it's over in seconds.
Wizard is hands down the MOST fun class I've ever played in EQ2 so far. I wouldn't dream of switching.