Zhao wins. Renpa plus 4 commanders are as good as the Heavenly Kings - Genpou and Kyouen in particular are extreme - is a combination that the Wei cannot overcome.
Reiou would be the noticeable problem since he's tactically very hyped but Renpa is superior overall. Genpou can be put against whoever, he himself is so strong of a strategist that he was suitable to lead Zhao's military, I'd be way more worried for his opponent. Kyouen is an ex Head of a state who faced even Renpa himself in the past and burned his head numerous times, as well having fierce clashes against Qin Six Kyou and Hakuki, who are above all Fire Dragons here. As for Kaishibou and Rinko, they are experienced commanders with their own great qualities which can be carefully exploited by Renpa's and Genpou's schemes.
Earl Shi is a strong commander but not to some huge/terrifying level, he got dealt with by Ouhon in Wei Fire arc. Gaimou is a meathead lol. He has big individual martial might but really nothing else going for him - though Reiou could make good use of him in this scenario.
This Wei army is impressive but it doesn't have what it takes. Zhao armies like Renpa's and Rinshoujo's are heavily stacked with super powerful subordinates and of course, Hara just treats the old Heavens way differently than the old Fire Dragons (save for Gokei, who ain't here).
