Im 28lvl rep account, for me 4v4 tier list this season look that:

S: Gryphon, Warmonger, Black Prior
A: Conqueror, Kensei, Centurion, Lawbringer, Highlander, Shugoki, Jiang Jun, Shaman
B: Warlord, Raider, Gladiator, Hitokiri, Tiandi, Warden, Berserker
C: Orochi, Valkyrie, Nobushi, Jormungandr, Peacekeeper, Shinobi, Aramusha

Hard to say because they have so low pick rate: Shaolin, Zhanhu and Nuxia. Meaby Zhanhu is high B tier.