It depends entirely on you and if your willing to pin everyday. If you are, just rotate site injections. On the other hand, I think prop has a half-life of 2-3 days and tren a I think is about the same at 2-3 days. So it's not a big deal one over the other. I've always pinned everyday and then I add a little more tren to the mix or maybe throw some mast in their. For example, I'll pin my cut-mix which is a 50prop, 50TrenA, 50Mast/per 1 ml. And then I'd add 1/2mil of tren A to the mix to keep the tren a little higher. So to answer your question bro, You can get away with EOD pining on this one. If you want to pin every day and don't mind and you think it might help keep your blood levels a little more stable, go for it.