hm..an idea, to prevent too many forfeits cause one of the team isnt here in time and solves the question, i mentioned at war-rules thread, if you have to make 6x 15/15 decks, if possible, or you can use only 5:
before round starts (and opponent are chosen), every master announce, how many players of his team will play this round, at least one. if one or two dont have time the next days for the war, it is no problem, BUT
if you win you can salvage ony that amount of cards, players played this round for your team, so 1-6, and, if you lose, you have to sacrifice 24+(24-4x) cards, where x is is the number of players, played this round, so at least 24 and max 44 cards. if you have to sacrifice 44 cards and only have a 30 card deck (maybe only 24 cause opponents salvations), you can choose cards from your vault, you have to remove.
this way it will be faster, "full" teams will have a great benefit from it and we wont have forfeits.
*edit*
an example: one of my players is for 5 days on holidays in disneyland, so before the round starts i announce only 5 players. now, every win gives us only 5 cards (5 cards less if everyone wins), every loss costs us 4 cards more(20 cards more lost, if everybody lose, that way), and otherwise we just decide the deck for him (30 cards, we dont need in vault) and lose them all because of forfeit, noone will be happy, the opponent doesnt get a cool game and 6 more or less crap cards, but the days till round ends he has to wait for nothing, and our team is also unhappy.