Originally Posted by
goodspeed
always. If you want the dc's or extra dmg. Heighten takes a spell like as said niacs and takes it to the casters level. Or whatever the maximum lv the spell can reach.
Quicken is taken by wizards as they don't have the inherent casting speed that a sorc has.
I suppose a sorc could take quicken for uninterrupted heals. Though I can't ever think of a time I was ever interrupted casting a ball, or a heal scroll. And with feats id want a handful of other choices before I'd choose quicken if they gave sorc's 1 or 2 more slots.