Before I stopped raiding due to time constraints (Offshore work for 5 weeks at a time, with no WoW), we used to do experimental crazy-kara runs, stuff like me solo healing with a solo pally tank etc. The last few times we cleared it, I dual boxed my mage and my hunter with decent success..

It took some time to get used to positioning etc, and I am still struggling with my trapping macro (drop trap, target focus target, shoot it, change target to lead's target and keep shooting), but other than that it worked quite well..

The hardest fights were the trash leading up to Curator, and of course opera..

Never tried more than 1 hunter though, but I guess it should work somewhat similar to my warlock team, which is great fun.