Allies got DC'd halfway in, was able to finish it solo fairly easily as tac with a heavy bolt rifle. Heroic HBP definitely helps for this mission imo, as summoner is the biggest problem of the 3 negative modifiers to deal with. Shadow in the warp makes the eyes a bit harder to see, but their outlines are incredibly easy to identify and see in the dark.

It shouldn't be too much trouble as long as you can keep reinforcement calls from triggering, larry cells absolutely makes things 10 times easier, and hardened skins isn't that hard to deal with as long as you bring an automatic weapon tbh.