Here is my first Raven Guard HH miniature completed as of last night.
I've done a freehand Raven Guard symbol on the kneepad, heavy weathering on the cloak and added a dusty look to the lower parts of the armour, a half green field on the shoulder to designate tactical squad and some wear on the Lightning Claw blades.
Did what I could to make what could be a very boring colour scheme to paint a bit more interesting. If I add the same simple weathering and damage to the rest of the tactical squad when I work on them, it should work well. Small additions like equipment pouches and grenades should break it up too.