Having played AST for quite a while, I would suggest a different effect for lady of Crowns and Lord of Crowns instead of damage. Since TP is not a thing anymore, if you drew a shire card it would be completely useless until you had draw again for 30 seconds mid fight. I would like another way to regain MP also, Lucid Dreaming is nice and so is lightspeed but I feel like the Piety build just doesn't cut it since SCH and WHM have different means to obtain some mp. I personally would love if they added a special effect for each card.
Balance:5% damage boost
Spear 5% crit boost
Bole 5% defense boost
arrow 5% cast time reduced
Ewer: 30 Mp potency regen for 10 seconds
Nothing too Major, I'd feel like this would give Astro back it's diversity from the other healers. Being the weakest dps of the 3 healers.