The vault seems to be working fine, Pervepic (all the numbers add up correctly). Maybe somebody fixed it?
I was also wondering if we should add in Purifies? In the event we play against Death or Water, both of which could utilize poison (not to mention there are scorpions now). Unfortunately, I can't think of a deck that would use them (except for an almost mono-air deck with wind pillars and a mark of water + purifies), but this is a very late thought. I only thought of it after playing against the AI3's water+poison deck.
As for some thoughts on the decks, I seem to be having the most wins (against the AI3) with QuantumT's deck and the Darkness-Air duo deck. I think pendulums are just really tricky for me; sometimes I have to wait an extra turn for them to produce the quanta I want before I can play something, which often ends up being my demise.