you should open up with the card in your spread (balance) and then royal road the bole.
if i have balance card in my spread off course i do that, that is why i type it "card (spread)" in my previous post because ast card chance is all RNG based.

basically from what i see, how you play AST card (and the combo) is depend on what card you draw, i've seen AST only draw 2 or 3 balance in the whole dungeon run while another one keep drawing nothing bole and balance

see why SCH's Sacred Soil gets almost no use outside of specific raid mechanics, and even then typically only during progression
no worries we AST have one too, it called Collective Unconscious and we cant do anything while the spell is active lol