Hearing the noise down the hall Vash acts with haste, WTF?. He throws the sunrod down the hall as far as he can to see if he can see whats coming, as soon as it hits the wall or he sees the creature (what ever is first), he then starts running for the main room. (if the corridor is too dark, he will run his hand along the left wall to guide him back.)

With a huge smile on his face as he runs to the exit. Well time to go!!! Come on... NOW He'll reach into his vest and drink his alchemical mutagen on the way (+4Str, -2Int)

Once both are in the main room, he will try to jam the door while Pedivere climbs the rope. With a carefree spirit. I can climb quicker, you go first. Quick.

Spoiler
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Disable Device: (1d20+8)[10]
If it has a lock, he'll throw the bolt and disable the lock. Otherwise, if it opens towards him he'll jam his two daggers a few feet from the top and bottom. In either case, he's giggling the entire time. If it open out, he'll hold it closed as best he can (current Str 22) till Pedivere clears the room, then he'll climb quickly

Climb knotted rope: DC10 (5+5 for accelerated) Take 10 for 16 if permitted, otherwise (1d20+6)[22]