Thinking of light decks in terms of things that can probably handle the most variety that is thrown at us I would tend to think vader saders or peggies are the way to go. Peggies are touchy because of their 2 hp, but in the hands of our general, they can be much more formidable at 4 hp. I don't know if we have the vault cards to even put peggies together, but I'm thinking we don't at this point.
I haven't been on top of vault stuff, purposefully, seeing as this was my first war I decided those more experienced were better off handling this task. I make no apologies for that and I think the mishaps have been handled well enough, considering the state of confusion we entered war with. Everything else, I did my best to help participate with. In retrospect, I should have been more involved with the vault because it is nearly impossible to deck build when you are clueless about vault contents.
In terms of strategy, I think our downfall was that as an overall theme of our decks, we relied on stalls and pendula too much. These are GREAT strategies and are without a doubt light's strength when these decks are unexpected. I would argue the two best unupped stalls in the game (firestall and the immortal) focus around light cards. If we could go back to day one, I probably would have gone back and tried to create more offensive initial decks, with the ability to throw in some stall decks as a surprise. Hindsight is always 20/20 though.
Back to the initial discussion of how to build a flexible deck using the remaining 39 cards... some smaller version of our last stand cards is probably the way to go. If we have novas I would save those to try and launch blessed vader saders with momentum. The problem with any sader deck is that saders are so damn expensive and highly unstable since they require a 2 or 3 card combo before they really start working. In truth, I wouldn't expect any sader deck to carry us much further, but I think it is the best we have to work with. I will post in the last stand section what I think would make a good starting point for our 39 cards and people can modify/flame/adjust/praise as they see fit.