Looks pretty good. Do tyranids have souls?
I'd be careful picking on the wolves so much, they wouldnt be a chapter to stay idle about such things. Seeing what they did to the world eaters legion on Armageddon, a space wolve attack into Commorragh wouldn't be pretty. pretty sure the dark eldar would come out on top though since it survived the entire salamanders chapter with support from two others. They'd find a way to sniff out Commorragh some how or another.
The triad idea is pretty cool though, and seems to make a lot of sense to me. It might be a little too fortunate that dhrazikar and lady hellia feel they can trust each other so well as well as lucien.