I highly highly Suggest Dreadknights even if its only one, And you have to Kit him out Hvy Incinerator and Nemesis Force Sword. He will always give your opponent grief and he is very likely to make his points back PLUS almost guaranteed to do what he does best which is flaming units then crushing their souls with his 6 attacks on the charge that he gets to re-roll cause the sword. I run 3 of them personally but i play a very very different kind of grey knight list^^