man, why do you need such a high concentration? The more concentration usually the more pip... why do Pfizer and other pharma made it at 250mg ml? The main problem is that oil being absorbed and test remains between muscle cells etc... your gear can easily crash etc.. lof of people is really into high concentration gear and developed recipes with super solvents like Guaiacol or EO , MCT , is g2g bro etc etc.. are you planning to run 400mg of test on a weekly basis? The most smart thing you could do is to brew it at 200mg ml and run it Mon and Fri...
test cyp is very very similar to test e... so don’t understand the point on blending it into test e ...
I made in the past one batch of test p at 100mg ml in MCT and one batch of test e at 250mg ml in grapeseed oil (now I use just MCT) ... and I did draw 0.5ml of test p and 1ml of test e... never had problems.. and in the same syringe there were other compounds.. that seems they can lower pip from the firs ones..
I inject slowly into my gluteus..
Lot of people complaint about severe test e pip... I didn’t have from it... so I could suggest you to run Cyp and prop if you end up having big pip from enanth... I would brew regularly both of them and having both mixed in my syringe... 1.5ml of oil 2 times weekly cant harm cmon, cant really understand this fuckin trend of high concentrated gear