Basculegion
I won't go into too much detail on the set here, check out the breakdown Diamonds did on the
underrated sets thread! This legion is a great mixed wallbreaker noticeably luring slowbro, but also hitting a lot of physical walls hard with shadow ball while maintaining the same power as scarf legion on its water moves. Wave crash is your main stab, shadow ball hits slowbro (after a wave crash) and 2 hits a lot of other physical walls, jet is nice priority and flip turn gets you chip and momentum.
Mienshao
After we lure slowbro we need to have something that appreciates it being gone! Mienshao is the premier scarfer in the tier for good reason, and has incredible longevity thanks to regenerator. I think most of us agree that shao is the second best mon in the tier after slowbro.
Slowbro
Speaking of the best mon in the tier, here he is! Slowbro provides a defensive backbone to the team helping it to not lose to a lot of the physical threats in the tier. Slowbro is very hard to kill after a cm, scald spam is great into basically all of the tier, and psychic noise prevents recovery which is another nice trick for it to have up its sleeve. Psyshock is also a perfectly workable option here.
Magnezone
AV Magnezone is a special tank for the team. While it doesn't have lasting recovery, it does check a lot of the special attackers in the tier and it also gains momentum into talonflame, another notable thorn in Mienshao's side. Modest and Analytic allow zone to still hit hard on the switch while maintaining solid bulk. Tera Dragon and mirror coat are on here mainly for the Sun matchup, allowing zone to check venusuar.
Talonflame
Talonflame is in my opinion, the best hazard removal in the tier. Having cleared hazards is very important for keeping this team healthy as it wants to switch around a lot by nature. It leverages its speed, typing, and burns to check many physical attackers and burn the opponents as they try to u turn. It is also the team's answer to krookodile (unless they have stone edge but that isn't common) and does a great job supporting the team.
Flygon
The team needed a ground type (for a powerful EQ and a stop to volt switch) and a hazard in the last slot. While krook could also function here, flygon has access to a pivoting move in u turn, and priority in first impression.