I think it would be best to get bloods run to see what your levels are (you will need that for testosterone anyway, so can do estrogen at the same time).
In figuring out the estrogen, I think it's got to be a combo of what the blood levels are and how much you need for symptom control. I reckon we need to factor both those in, to judge what to do.
You might need to increase your Cyclogest too.