Scratch what I told you about that Pervepic. There's an even better way to do it. If you just take 58 card decks with all 29 air cards (for the sake of argument), then you only have to discard 1 air card. So you can last basically as long as you have the cards to keep losing, at a rate of only 1 per round.
The optimum deck size for this would be 36 cards, with 18 air cards. You discard the 18 off element cards and 12 air pillars/pendulums. You then use the salvage to get back up to the 18 air cards. Doing it this way, you could even keep 11 air cards out of site for when you were forced to try and win.
So guys, it's decision time. If we want to win at all costs, this is definitely the way to do it.
Edit: Pervepic, you don't have to let us lose. It's really just in the choices of what decks we play and what we discard if we do lose. Basically, we try for as long as we can, but just play decks with all air cards and discard the air cards if we lose so we can force the count lower.