Well
I would say that any skilled healer will not be in ranged except for mechanics requirement

Like do you really see a whm behind his group ?
If the answer is yes, ask him to hand over his staff

All healer should be be in melee range or close range (3/5 yalms)
Because because far away kill all his spell so... It's dumb to run away

The only one that can go a bor far away is the scholar that put his fairy near the melee
Because she is his main heal tool

....

Otherwise i like the geomancer idea
But he need a spécial power to be unique
Or he will only become sub SCH or sub Whm