Solo heal yes. You need to have synergy between the white mage and the scholar for them to really shine due to the fact you can't sit there and spam adoloquiem constantly or you will run out of mp. For the most part though, physick spam has been enough to get me by on my scholar fairly easily up to turn 5. That is when needing a lot of burst healing and the damage mitigation of both a scholar and a whitemages stoneskin as well as burst heals start to come into play if you don't want to risk your tank getting completely obliterated before you even have a chance to get a full cast off.
There is also the factor of Sch having terrible AoE heal capabilities if you don't have your healing fairy out and all of the buffs that it can pop up at once. If you do have them both up you can get some pretty sick regen and damage mitigation + healing on the entire party, but if you don't then you are going to be looking at healing about 350ish to everyone in the party tops with a damage shield which isn't going to cut it on anything past titan.
