damn it, wrote a long reply, then got logged out and it´s gone.
short version:
I really like the models, especially the armor and weapons! Good work on the Razides, too!
Here comes the train with constructive criticism

a) The Necromutant leaders look totally unfinished. Apart from the obvious base, one is missing a painted chain on his skirt. The left belt buckle doesnt look painted (its still green) and he has flesh painted on his skirt. The right one has flesh painted on his left hand bandages. The faces and muscles could use a last layer of paint (highlights).
b) The purple things on all weapons dont look highlighted at all. This gives them a strange look as the rest is totally weathered.
c) The belts on all Necromutants look unfinished somehow.
d) Not your doing, but: Do the Stalkers REALLY have arms that long? They could scratch the bottom of their feet while standing tall. Looks apish somehow
e) All in all, your army looks very uniform - which is normally a good thing. Only here nothing except the Razides really stands out. I dont really know what and if I am going to do different once I get my stuff (end of next week it should be packed and on its way). I feel the Necrobeast riders and the Lords could be a chance to bring more colour to the army.
But, all in all: good job and overall appearance.