"Team of 3? Nah, I'm good."
I realized I skipped showing SET UP so loop back at 9 seconds. Using Option button to skip picking teammates. Evil (Orochi) Iori is a much bigger threat here than Single given his boosted HP. My strategy against him has come a long way.
Single, Tag and Team each have 8 chains of opponents that get replaced with 8 new ones when you unlock all characters. Akari is a massive time sink and I'd rather avoid Evil Ryu/Iori as regular opponents when they still have boosted HP. Thus I play here on my Switch's guest account.
I think the Ryo-Ryu-Kyo chain is the best choice. The 1st round opponents must be nerfed compared to later rounds considering how cooperative turtling Ryo is. Ken in Stage 4 is much more threatening than Ryu in Stage 1. Final round opponents have relatively weak AI. Guide could wall off the rolf stomping plan but chooses not to.