First thing first, you can't shoot through the krill, you have to wait till he steps into the light and they fly away. (vice versa for you - stay in the light!)
Second - I start with the "heavy weapons" - Torque bow/Sniper rifle, headshot if possible. Plug him as many times as you can. When you're out of ammo, switch to the lancer and empty everything you have into him, once again - only once he's "krill free" otherwise you're wasting ammo. That should do it.
I agree with useless about the grenades, when he gets close blind throw them to distract him, and if need be run to the other end of the car, there's very similar cover on the other side.
The best thing to do though is invite a friend in and do it co-op. Bot Dom is an absolute idiot! I'm keen to do it again (I'm keen to try get to the troika), so if I'm online drop me an invite.