Giving Astrologian massive +% Damage is a surefire way to repeat the previous meta of AST being the mandatory healer. Stacking with Sleeve Draw, we'd be looking at a possible +15% Damage with additional effects on each DPS, or 25% flat DPS gain, being the strongest damage buff Astrologian would have to date, as well as exceeding whatever damage any other healer could personally contribute, and vastly superior to any other buff in the entire game.

Your Redraw changes are essentially "Let's just remove the RNG entirely." Allowing for four cards to be decided on within a 30 second window, you may as well have removed the Seal requirement from your Divination.

If I were to line up my buffs perfectly I could achieve:

+25% Damage
+20% Healing Potency
+10% HP Recovery
+20% Damage Reduction

Which part of this is supposed to be fair to the other healers?