fair enough points made towards a possible clean time during most of the time last year.
i wouldnt think of it as intolerable either, painting the cirumstances you made. but i doubt there are a lot of people out there who really restrict to consume a specific amount. most slowly prograde to consume more up to the point obvious symptons show themselfes and have to stop/detox/reduce or surroundings/habits/"friends" change.
i still kinda doubt that hes really into amphs due to his healhty lifestyle. snorting some before an important matchup could be possible, but still wouldnt explain his overall hyperactive/clowny behaviour he used to have the last couple of years overall, considering he wasnt using on daily basis.
i have no doubts a lot of pros are or used to get prescribed ritalin e.g. in na. still, there have been a lot of remarks since summer 2015 and c9s short run, which stated, that there were tests taken at higher level tournaments.
edit: the twitch clip is kinda hypnotic of his own, cause neither the cameraman, nor the background nor mantursse stopped moving. this kinda emphasized pashas behaviour, besides maybe some natural dopamin after winning in a strong fashion etc.