Get him past what? Lol
Mougou was inferior to Renpa his whole life and then lost his arm to him in a duel
Kanki is already confirmed to be above Ousen anyway and would Kochou him if they ever were to face each other.
Ousen observing the Han battle for tips:
"So to win you actually need to have a strategy and a plan and not just hope for the best while saying Hoh"