I'm planning on dualboxing warrior-mage and have been practicing some rotations. I think that the kargoz videos are just scratching the surface and that it will require actual testing/practice to figure out which combinations are a) optimal and b) fit your playstyle.

With warrior-mage I find I don't really need a healer. Mobs die pretty quickly and hamstring+Frost Nova kiting and aggro volleying results in taking much less damage. I've been working on mostly single Target rotations and find that to get the most out of warrior-mage you need independent movement controls on both toons. Being able to pull while the other character is drinking/eating is important. I have some recordings if anyone is planning on running a similar setup and is interested in some techniques I've identified.