If there's any? or is there no limit like stamina recovery. or do you guys know any soft cap for stamina cost reduction? So that I can put the rest of my champion points on stamina recovery/tumbling. Btw i have vicious ophidian
There are no soft caps. Soft caps were removed a long time ago. The only diminishing returns you face are in CP allocations, since each additional point spends affords a marginally smaller benefit.