I´ve tried 0,80ml every 15 days and it was ok but personally I prefer to pin once a week, I feel more stable emotionally and physically. I am doing as little as 0,30 a week now and I feel ok, I´m even thinking about lowering the dose to 0,25ml a week because every time I do bloods total T is between 900 and 1100 and free T is always above range as well.
I do 12.5mg exemestane as well a week as my E2 rises a bit and it affects my mood and libido.
Hematocrit always borderline or slightly above max and I make sure I´m well hydrated every time!
For me this protocol seems to work best.