The way I did it was increadibly messy, a bit long, but it worked. I wanted to grab wolves to toss at the casters, but it had been so long since the last patch that there we no mammals up at all. So, I put on my resist gear, and twisted in a resist song followed by two chants, resist, the next to chants, etc. for the cleric and wizard. Soon as I got my target away from its partner, I would mez it and strip it of its buffs, then start chanting again. Once a few spells got through to me, I would just mez and regen up.
It got a bit dicey with the wizard a couple of times, but he blew all his mana pretty quick and ended up just casting low level nukes at me, that I easily resisted. This does take awhile, since the first couple of nukes still hit pretty hard even if partially resisted, but it works. Just make sure to mez when you get down to 70% or so, trying to push it runs the risk of him sneaking a big nuke through and you taking a dirt nap.
The cleric went down really easily. He spent so much time nuking me that he didn't have enough mana to try and CHeal himself. Went down pretty fast. The shaman never cast on me once, and getting rid of his pet was a minor nuisance.
Just keep on your toes, especially with the wiz and you will be fine. Be sure not to do as I did and answer a tell in the middle of that kite.