Some good ShadowHawk builds that I found work well for me and do damage above their Medium size:

Fast Chainsaw Dakka:
SHD-2H XL295 3xAC2 (substitute XL275 if you want one extra ton of ammo)

Fast Light Killer and Brawler:
SHD-2D2 XL275 LB10X + 4xSSR +2xMPL

Fast Med Brawler and Support
SHD-5M XL300 2xAC5 2xML

i7-7700k@4.5ghz, GTX1080Ti,BenQ XL2420G-g-sync,Oculus Rift