>>214463952
The rank should be
Pre mark/death/retirement
Gyomei>Sanemi>Obanai>Muichurou=Rengoku>Tengen>gyuuu>mitsuri>shinobu
Post mark/death/retirement
Gyomei>sanemi>obanai>muichirou>Gyuu>mitsuri>shinobu
Rengoku was unlucky and got culled out by akaza before he could unlock the mark. Marked he would be between obanai and Muichirou considering he was more balanced than the latter (muichirou is a glass cannon while Rengoku had a more balanced kit despite being lower in dps).
Tengenβs strength was more about his versatility as shinoby rather than raw technique, so he would probably fare lower than marked Gyuu, which 11th form is an almost perfect parry.
Obanai is the weirdest one to rank, since he doesnβt go full power except in his final battle, because of his sick body.