Hopefully my last two questions for today

I assume the PCT, which I read started approx 21 days after my last inject, is only about a month long. How long should I take the Nolv once the 21 days has begun at the 20mg dose? Is taking 500mg of the Sust once a week as good or will I get better results from taking it 125mg eod (thus 500mg one week then 450mg the next ect.)? The second question is asked in the hopes of avoiding shots. And for the same reason can I take my 400mg of Deca in one shot once a week or is staggering it through the week that much more effective?
ar?