For 400 I pin it all at once on a friday.That way I can be a yahoo for the weekend. If I pin it twice then wed, and fri, and then I can be a big yahoo on the weekend!
You are not going to notice a difference no matter how you do it. Once per week, twice or three times. Mostly what I tell guys is if you do not like needles then do it all once per week.I have tried it many ways, many times...you will not be able to tell. I have been doing 3-4 months /year of deca in combos for 42 years now, and have detailed notes on every cycle.Pin it..work out, eat right ,sleep right.