Do you want side effects??? The goal is to only use as much as you need and avoid as many side effects as possible.
I have been using 20mg ED for a little over 2 months now and I get pretty much zero side effects, except my stubborn tren acne finally went away.
How bad is your acne is the indicator of how much you might want to take. Also it will take much longer than 8 days before you start seeing relief. Give it at least 4 weeks for anything at all to happen. YMMV