Got my wizard/rogue up to level 8 (7 wiz 1 rogue) so far and really enjoying it. I do feel like I'm being completely carried by my fighter/cleric duo friend though. Fights usually come down to me spending 25% of my mana bar nuking down 1-2 mobs over 10 seconds, while he's just walking around 1-2 shotting everything with a two-hander and cleaves. I also drop like a rock if I get a few mobs on me that make their saves vs my CC. I keep telling myself it gets better later when I'm a higher level wizard
We bought VIP status for a month, so we've just been doing everything on elite mode, which has been rather challenging. Nice change of pace from most recent mmo's where the leveling content is faceroll.