Healers in Stone, Sky, Sea

[Taika]

How's everyone doing in Stone, Sky, Sea on healer jobs? The only one I've tried on my Scholar is the A4S one. At first I got to 4-5% on the first 3 tries, then I had probably more than 10 tries where I ran out of time at 1% HP... It drove me crazy but I finally beat it today. I was using Thordan weapon and otherwise i210 gear in each slot (all pieces with as much crit as possible). I didn't use food or potions.

According to this chart the DPS requirement for SCH on that doll is 897.78 which is quite high, I guess, but I'm not sure if I should be struggling this much with beating it... So how are other healers doing with the dolls?