I've been test running a DHA, and they make AMAZING supports. Ignoring the breath weapon for now, they can fill in as a secondary melee with a long spear, using a claw to threaten adjacent. Theres an Invocation Tax (in the form of Endure Exposure, cause otherwise you're going to be blasting allies) but you can actually afford to grab, say, Gold Dragon as your Totem, pick up Brilliant Dawn, and focus your maneuvers on a secondary White Raven or Devoted Spirit. You're focusing on buffs and support; it might be worth grabbing Nature's Balance instead of Brilliant Dawn, cause that has better heals and buffs, IMO, but Brilliant Dawn fits flavor nicely. Then dump a feat to get the Nature's Balance aura for infinite healing and spend an invocation on Beguiling Influence. Pseudo-free +10 to intimidate/diplomacy/bluff on a Cha focused class? Yes please!

Unless I misremember, you can feint as a standard action to flatfoot someone against everything, and so you sit there demoralizing or feinting while initiating maneuvers and formula, and then go "BOOM, DAMAGE!" with your breath, which you overpowered the crap out of with Metabreath feats. You just need to focus on Swift Action maneuvers and formula. It's quite nice.