The biggest thing the OP is overlooking is a Khelds main attack streams are tied to the Dwarf and Nova, they are custom powers with animations tied to those custom models, it would be easier I suspect as was mentioned above, to use the abandoned primalist AT code left in the game (yes it was abandoned, Posi said it himself, said they couldn't figure out how to make it fun to play) everything I've heard from now 2 generations of devs is changing stuff on the Kheld AT's is a nightmare of unintended consequences (I believe thats the reason only one of them has working colour tints)