Even though Dracomorph is a God Tier Champion, I'd say maybe Kael depending on the gear you have. You need someone who can farm campain level 12-3 on Brutal. Running that stage with 100% success rate will allow you to farm XP and silver so you can level more chickens for other champions.
He'll need better gear in order to be your farmer. You will need speed over 170 and high rate, damage, hp and def so that he can survive. Once thats done and you can clear it 100% time, move onto draco.
Yeah i think i'll need more time in dungeon and farm to have more money because i struggle to have a gear that is really decent, or maybe i use the wrong sets