200/200 would kill my joints. I have to do 300/200, and then everything is great. Conversely, at 600/600 pre-comp it was perfect last fall. When I am only taking ~200 test, 80 mast is all I could consider.
Ratios are just a starting point- the sooner you understand that, the better you will be. Doses are individual specific & situation specific. Like when I take bigger doses of test, I am aromatizing more to estrogen so I tolerate a higher amount of mast better.
So you start with ~1:1, like 200/200, and within about a month or so you will know if you feel great or if you’re getting to dry (or maybe still too wet, if you are a very heavy aromatizer). If doses go up eventually, you may need to bump one or the other more depending on how you are feeling.