Synastry is a bit op.

[Donarudo]

Oh are we playing this game?

Then lets factor in the significantly more potent direct heals that Astrologian gets for raw healing that scholar's fairy + the scholar can barely scratch. Then WHM absolutely craps bricks on the Scholar's actual healing healing.

Cure 2 = 650 potency and aldoquium with emergency tactics (30s cd) heals for 600 and costs a cluster of mana. Benefic 2 that is spammable is 620 potency.

Furthermore AST has a ton of HoT power that can easily make up for the lack of fairy.

Sorry you don't know what you're talking about. I have played nothing but Astro since the 19th, and I can assure you what you are saying is false in regards to the Astro. By the way I main a SCH. Frankly unless you played the job you wouldn't know the many short comings it has.