Originally Posted by
Herald of Nurgle
First - how many points would you intend to get to, in each army?
If it's 1500 in each, then you're on the right lines. Vraks, AFAIK, has no ally system. Therefore the only CSM you'll have in them is:
- Alpha Legion (Vraks 1, right?)
- World Eaters (Vraks 2) or Death Guard (maybe. Vraks 2)
Vraks 3 is, of course, Daemons
Go for a list of both. If you want Iron Warriors, then get gW Direct Warsmith and Iron Warrior packs. Fill with some 'Thousand Sons' (aka: your heavy troops) and Havocs etc
Up to you