I was looking at the Raptors traits. That might be a good trait for my chapter- keeping the fist's skill with bolters and adding the maneuver aspect. The downside is that the bolters are changed to heavy when you use them as rending. Not sure my guys should be standing still instead of moving in. I also like the Star Phantoms- rerolling ones on deep striking units will help get some of my units in quicker. (Sadly not flyers, if I understand the rules right.) Gonna put together some lists and see what units show up most.