I pretty much stayed with a 1:1 ratio, so 150mg test e and 150mg mast e for example. Seems thats what most guys follow.
Ive seen counterarguments, "why no just up trt test to 300mg? Either way youre using 300mg AAS, and the addition of mast is merely a weak excuse to justify what amounts to a cruise or even a light cycle." Theres some truth in there but, 300mg test is not the same as 150:150. Numerically it is, but consider all the implications of running 300mg test vs 150 (higher e2, higher AI needs...higher SHBG...etc). 150:150 mast circumvents these negatives.