Nofasse 'Eadhunta wrote:
HQ is a dude who's really good at everything, including costing a lot of points. He usually doesn't impact everyone else when it comes to actual fighting, but he might provide you with supportive effects (i.e., letting you use his Ld for your morale tests). If you use Space Marines with your DH, Chaplains are really nice HQs. Stick 'im with some Grey Knights and you've got a really killy CC unit.
If you use
SMs as allies, you can't use Grey Knights(only the other Daemonhunter units, like daemonhosts and stormtroopers).
SMs can take Grey Knights as allies, however.
It's really stupid, I know.