Perhaps also having Divination on the sigils (with a percentage increase of 2%/5%/10% depending on how many unique upright sigils you have, with Astrodyne able to be given to another person, and the mp recovery being switched out for a dps buff that's double Divinations, and the potency/percentage of each part of the Astrodyne buff increasing with how many unique upright sigils you have.

having 3 reversed sigils gives you access to using Celestial Downfall (AoE) and Grand Starfall (Single Target), with potencies of 500/700/900 dependent on how many unique reversed sigils you have (500 for 1, 700 for 2, 900 for 3)

granted this doesn't completely remove the RNG factor of the cards, but it does hopefully heavily lower it to manageable levels. plus tbh i kinda did love the RNG factor for the cards. don't like the card you pulled, or need a different sigil? Sleeve Draw your desired card/sigil, and redraw it to the next sigil in the line if that somehow didn't work. and if that doesn't work? Minor Arcana, Misdirected Fate, or Stellar Ascension. also note these potencies are off the top of my head lol

(2/2)