A large swarm of chew wasps or a single rakosh.
You can select one weapon from the rpj arsenal. You have no one else to worry about, just yourself. You are in a massive warehouse, only one way out, through your chosen foe. Which one do you take? Why?
Personally, I'm going with the rakosh. For whatever reason, the swarm of chew wasps seems more alien to me. The idea of glass-like teeth, and a lot of the little bastards, screams bring on the rakosh.