I thought this would be a cool topic, esp. since ppl seem to think stuff like
"What will a new healer even do? We have a big heals/regen healer and a shield healer already. AST was just a combo of them with a [card] twist."
Well, how about healers based on:

1) Direct physical/magic defense. It'd be different from SCH, whose main healing specialty is nullifying based on amount healed.
2) Damage dispersion. Ex: making a single 30k hit dispersed amongst many.
3) Damage reflection. Like reflecting damage taken back as the healer's DPS.
4) Damage absorption.
5) Damage delay. Ex: making a single 30k hit into a 5k hit for 6 ticks. Or with holding damage with a meter to be dealt later (though this could be abused). TIME MAGE, anyone?
6) MAINLY HoT based healer with limited direct heals (like Cure). Uses STACKS to make HoT heal all at one time (think BLM Thundercloud, but it wouldn't reapply the HoT.) [I know it's based on a healer from WoW, but it's still cool]

Thoughts/ideas?