120mg Cypionate, for the simple answer on ester.
As for the SubQ reasoning, it's a two-part answer. One... if I don't have to harpoon myself and/or have muscle soreness, I'd like to avoid it. I know I can still do IM with smaller gauge needles, but that still leaves the possibility of muscle soreness when working out. I have heard anywhere from "it's a non-issue" to "that quad injection left me limping". So, just avoiding if possible.
Reason two: I am overweight. E2 is already higher than I want. Aromatization is a concern for me, and I don't want to use an AI if I don't have to. I want to manage E2 but not crash it out. So, based on the forum/reddit/youtube research I have done, that can be managed in two main ways with injections - frequency and tissue. The higher the frequency, the more even the levels, and the absorption is slower/more even in SubQ tissue.
So, hopefully, going about it this way, I can avoid high peaks leading to high aromatization and keep E2 to a minimum. Also, with those smoother levels, mood is also said to be much more even, and I am on this stuff for the mental benefits more than the physical. The physical benefits are a cool bonus, IMO.
I am doing M/W/F currently for injections. If I get E2 sides, I will increase to EOD or even daily if needed, just while I am still in the weight loss phase.