I have yet to try primo. I guess it's because some people live it and some say it's not worth the cost. Mast to me makes the most senseMy ratios are
200 test
150-200 primo , depending on how sensitive you’re to primo AI effects.
Plus either
A) 400-600 deca
B) 350-500 NPP
C) 500-700 tren (for some reason I get more mental sides on lower doses of tren )
Alternative is 200 test and primo. If u run HCG you can crank up primo high because HCG helps
Make e2 in ur testes , and this isnt blocked by primo
My examples
200 test
250 HCG ED
800+ primo
Or if no HCG
200 test
300 primo.