A baseline number means nothing at all, it has zero bearing on your care once you start TRT.
The E is the part toughest to manage, once you achieve that steady state, get re-tested (TT/FT/Sens E2), and make SMALL changes from there. If you're doing EOD or ED injections, you shouldn't need an AI at any point on that kind of schedule, it's just about a "rule" unless there's another medical issue driving it, that no AI is needed with EOD/ED. People make the very common mistake of taking big swings at their meds, they feel this or they feel that and coupled with any anxiety, muck things up without ever getting to the steady state. Or lack the committment to the dosing and schedule.
There's a real fallacy to the notion that "I feel bad TODAY, so I have to do SOMETHING, TODAY, to fix it!", and that's just a path to failure with TRT.
I understand what you're saying and I agree. I know that having T at say 800 and E2 of 16 would probably make me feel like Crap. But I haven't made any changes since returning to IM last summer except for Anastrozole dosing/timing. It's the E2 sweet spot that I'm chasing. Not a number. And I still haven't found it. That's the reason I'm considering ed or eod.