So by the time this whole situation comes up, he's gonna be pretty exhausted from fighting in the jungle and having summoned monster ghosts a couple times, and probably be out of ammo for the handgun Drake let him use. But he's still gonna be his scrappy self and fight as hard as he can with whatever comes to hand.

Klaus chose to defend the Door because he's only been here 2 months and doesn't know about or understand the god drama, but he knows the Door is important.

If anyone has guns, ammo, or grenades/explosives he's really good with them after Nam, but I expect his biggest contribution to this fight is probably going to be one last Big Monster Summon (I'm open to suggestions on what colosseum monster people would want, since I've only been around a couple months myself) which is going to need to be provoked (the Taaco twins have volunteered to high-speed bully him until he's pissed off enough to do it) and is probably going to completely wipe him out. I imagine he's going to be pretty banged up, possibly seriously, but he's a cockroach so I don't have particular death plans.

I don't have any timeline in mind for this one last summon, so if anyone needs a moment of "big guns" hit me up and we can plot things?