You SCHs need to realize something. You are not meant to be the best at healing OR nuking. You are supposed to be the best at doing both at the same time.

BLM: Master of damaging spells.
WHM: Master of healing spells.
SCH: Great at being a weak BLM and WHM, but never surpassing either.

Why do you guys think that you deserve to be better than a BLM at nuking or a WHM at healing? You are already better than a BLM at healing and a WHM at nuking. Just enjoy that.