Nobody has any info on a "safe" dosage?
You are missing the point here.
The 4:1 ratio for test/Epitest was established to reflect the NORMAL UPPER BOUND of what is expected in a healthy male.
A "safe" dosage would be anything that mirrors a NORMAL healthy male.
Is it 75mg per week, maybe 100mg?
It doesn't matter because it is approximately what the normal healthy male would produce.
So by using a dosage that approximates the NORMAL health male, you are only replacing your own normal production of test with an exogenous source.
You are taking a risk with no real return. Do you see that?
In effect, you are really not cheating as you stated in your first post.
Get an epitest cream and figure out, through trial and error, what you need to do to use MORE than what the NORMAL healthy male produces and balance the ratio so it is not detected. Then, at least in theory, you would have a performance benefit.