Not to reuse a phrase, but, as an aspiring SCH myself (please don't look at the man behind the curtain, he's my legacy character that I used day one so I could actually post [on reflection... I can probably change that now]), I kind of view SCH at end game like a BRD. BRDs are support damage dealers (ideally), and I doubt you would see any self respecting party say "We need a BRD instead of a LNC/BLM/MNK" unless special circumstances called for it. No, BRDs shine brightest when they are accompanied by other DDs. That being said, you never see a BRD complaining that... Ok, maybe I can't finish that sentence... but most BRDs seem quite content with their lot as support Damage dealers.

I view SCH similarly, we can heal alone, but we are at our best when supporting another healer. That's not something that we should be disappointed about, but revel in. It's our own little niche; and what makes the job interesting. In the interest of full disclosure, I'm only level 34, so I don't have Succor yet. I am, in fact, a baby of a SCH, but I love the job, and I think there's nothing wrong with playing second fiddle to WHM; after all, parties aren't an aria, they're an orchestra, sometimes what you need is a second fiddle.

As for Succor, as I said, I don't have it yet, but from what I have read here, I agree it could probably use some more utility. On the other hand, there are plenty of party members that rarely, if ever, get hit, except on first engagement - if something goes wrong - such as BLMs. As a low level SCH, I would find an AoE prebuff for the party to prevent early disasters invaluable.

Lest someone think I am hiding behind a different character, my actual character is Alec Temet @ Midgarsormr