IMO, its a decent list. you shouldn't be worried about anything stuffing up too badly. ive never used razor back spam, but it should work.
but that being said, i would gear up the runie. many times i have seen my expensive
HQ unit killed by a hail of bolter fire. for only 20pts you can make them a lot more resistant (ie runic armor).
if its close combat your looking for, the wolf tooth necklaces can be useful. if you remove 2 hunters to pay for the runic, the other ten pts could go here...
but, remember, that's just me.