That's really neat. I started as a 5race 5class, but have since race changed them all to Dwarf (the only worthwhile alliance race)
You might have more fun letting the Troll be a kitty. I did that for close to a year. No they're not optimized DPS because you can't possibly keep up with the "priority algorithm" that is kitty DPS in a multibox way, but they were pretty easy to either do a standard rotation or hit a different button for tiger's fury/swipe swipe swipe. You can even do a /cast [nocombat] pounce at the beginning of a macro so you don't have to wait for them to run up.
As for others talking about the guild thing, I've got 4 in one guild and one in another (f@#$ knows what for) but I find I do get a bonus icon for having 4 from the same guild in one group.
Sounds like you're gonna have some fun, enjoy!