[Dan296]

heres my 'tarch build.
mandiblasters, jetbike, reaper launcher, laser lance.

because he is on a bike, he can always shoot that gun, unless he turboboosts of course. that means he can move 12'' and shoot a heavy weapon. and then assault! i stick him with some shining spears. they can keep up, have similar equipment, and can also get out of combat with hit and run.

now your hawks are not gonna want to be in assault. but what is your armys preferance overall? shooty? assaulty? mix?
if theyre shooty, i would leave him on his own, and give him a reaper launcher. that way he can have some long range power, but then if things get hairy, use the wings to get into assaults and help out.
if theyre assaulty, i would leave him on foot and put him with banshees, or use one of the bike builds and put him with shining spears. hope this helps!
you can also read Steve's Autarch Tactica. its helpful.