you might want to take away some gaunt, and add a few lictors. That'll make it more fluffy
Also, is you want to stick with the fluff, think about this. The nids wouldn't want these big squads of gaunts to make a lot of noise. They would want small, sneaky squads. look on the picture of the front inside cover of the dex. It also might be a good idead to scratch thewarriors to stick to the fluff. You choose how fluffy you want to be