What are you talking about? Sacred soil is scholar's best ability bar none, it is already superior to kerasoil because it gets an extra server tick of mitigation and the heal over time. Moreover aetherflow (20%mp restore every minute) encourages better play than it's/all/greek/to/me restoring 7%mp on cast, with 3 possible casts per minute as you're not burning resources just to not run dry.

Sage was already buffed because it simply did not have the mitigation output of scholar in DSR so they stapled a shield onto holos.