After much research into all the alternatives, I have decided to try adding fenugreek. I know most use fenugreek at a single constant dose, but I actually plan to cycle it as well.
I'll take the recommended dose on the label, 1220mg, the first and last weeks of each cycle, and double that, 2440mg, the majority of the remaining time, except on days 13, 14, and 15, I'll take 3050mg.
My reasoning? Prolactin peaks mid-cycle and I'm primarily using FG for the prolactin. This has a side benefit of somewhat following my estrogen doses as well, since they also peak mid-cycle, so I'd be mostly taking more FG as I take more estrogens. Allowing it's adaptogenic effect on estrogen binding to possibly link even more closely with my estrogen use.
What I'm expecting? Mostly better milk duct formation. Right now my breasts seem to mostly be lobule tissue and a little fat depositing. I'm also hoping for better fat distribution into the area and a general increase in cell proliferation, providing more receptors for my estrogens to bind to.
I'll wait to add it until next cycle since this one is already nearly over.