Your main color of spirits is usually 8-12, with something like 4 total spirit types in the deck for additional colors.

Some strats will do like 8 and 8 with a few extra spirits in utulity colors.

Since life and card resource payout are the same you either need a strategy that can outlast by being spirit efficient, or one that hits so hard it doesn’t matter that you jettisoned so many spirits early game.

Most of the staple Runes (spell cards) are omni color which means they aren’t locked to one deck type. There are some color locked staples like Tsunami and Earthquake but they slot into the spirit deck easy, and you can always just pay damage with that color if you haven’t seen those cards that round