Putting together a support character for a friend

[McSmack]

If he wants to play a support character, then I'd advise a Dragonborn Warforged Warblade/Bard/Sublime Chord with Dragonfire Inspiration, Song of the White Raven Words of Creation and the like.

I think he'd end up destroying the party through sheer badassery

Cleric is a fine choice, though I'd check with the DM about Nightsticking and DMM ahead of time just to make sure it's okay.

Bard is also a great choice. My wife made a warforged bard/crusader who would record her songs on those embedded component disks from ECS. Then she'd insert them when battle started and the music would play out of her chest-speakers.

Yeah, I married a winner!