"Relies on a huge jet packed attached to its back, with laser blasters
mounted into his shoulders."
The Icarus' main advantage over you is his ability to fly. This makes it
possible for him to sneak up from above and behind you and get in a few
cheap shots. He is easy enough to take down if you are close enough and
he is alone; just a couple of shots with the super shotgun sends him barral-rolling
out of the sky. Watch out for him when he is far away (he has good aim with the blasters,
and your weapons tend to scatter more than his) and also when he is part
of a group. Always go for one at a time.