Again. How is he supposed to be useful on Planetos?
We can have him serve as muscle for a major colonization push into Sothoryos. Plenty of Dinosaurs for him to eat down there, ancient ruins to loot, serpent people to bring into the fold, etc.
We can have him help train the Valyrian Dragons we'll be hatching soon. That'll serve as a potent reminder of how poorly his ancient counterparts fucked up.
He can visit Relath to learn how a Dragon can successfully lead a city without enslaving the populace. While he's there, they can see about putting more hurt on Slaver's Bay.
Etc.
I'm peachy with giving him some equipment before we send him off, Plane-Shift item and a Brazier included.
What you want to do with him will need more than just some enchanted gear. He'll need significant support. Extraplanar mercenaries, perhaps? Maybe he wouldn't mind doing a short stint as an auxiliary crew member of the Golden Wind?
Or what about having him serve with the Shaitan for a while? They are actively fighting with the Efreeti where there respective Planes collide. He could be useful there, while also receiving the full support of the Shaitan forces. Except he's probably still Chaotic Evil, which means our allies will
Hate him.
We have no evidence of this and his behavior so far, baring the crotchety old man act, was pretty reasonable.
For some reason, my plan trusts him more then TNE, but I'm the Evil Dragon Hater...
You're not even bothering to find out what his Alignment is, dude. Yeah, he might be Neutral or Lawful Evil, but he's most likely still Chaotic Evil. Gold Dragons turn Chaotic Evil more often than Red Dragons change their Alignments. We don't want a Chaotic Evil Red Dragon representing us on the Plane of Fire, which is predominantly Lawful Evil in Alignment. Remember how everyone out on the Planes react upon first encountering us? No Red Dragons around in centuries, if not longer, and the instinctive reaction is fear, and for good reason.