Well, I was expecting Vail to be burning piled monsters up in the previous rounds, and Antares to don't be power attacking when his chainsword auto-kills those bugs even if he rolls just 1s for damage.
But even then you're managing to kill them faster than they're spawning. 6 bugs last turn, 5 now, and that's with two players and one allied NPC missing.
EDIT: Anyway you really shouldn't be staying on the same place. Those supplies aren't marked down for nothing.