Having hit 70 and done/farmed both EX primals, I can safely say that Scholar really has no MP problems. Lucid Dreaming is good but ultimately it was unnecessary. It's just to homogenize healers. Adloquium may cost a lot but in a long fight, you're not really spamming it either. The oGCD Aetherflow heals make up for it.

My issues are as follows. Fey Union's range is too small and party members leaving the range leaves the fairy healing nothing and wasting gauge. The range should be extended to at least 20, ideally 100 like SMN's bahamut. Putting Eos in the way of danger is just not smart.

Excogitation is very subject to team play. Often times the co-healer doesn't let the tank drop below 50%. Add in tank CDs and this skill is just too situational. Ultimately you can lustrate shortly after. Granted you can argue this wastes a GCD, but given that this skill is barely better than Lustrate, the potency should be increased and the duration too.