If we are allowed to take 18 of each life card, that's 216, not counting nymphs, pillars, or pendulums. If it's 24 of each, it's 288. In the former case, it leaves us with 205 cards, in the latter, 133.
Remember, we plan to fuel ALL DUO DECKS with LIFE PENDULUMS! WE WILL NEED A LOT!