With Heavy crossbow
Takes to long to reload it. Use the krinkov secondary. It tears apart the face plate and visor in 2 seconds
I would recommend SMGs rather than the Heavy Crossbow. CMP, Jacket's Pierce, Kobus, and Kross Vertex are all good.
I can't remember the name but the semi auto grenade launcher with a 15 shot clip I think is the best weapon in the game besides little friend 7.62
What do you think?