Hi.
First of all what's the need to do 150-250mg year around? It's not even a trt+ (small cycle as you mentioned).
Unless you do 130kg of muscle mass, it has no benefit to to this.
Just find a good balance between testosterone and e2. To feel good and not grow a silent gyno who will then ask for a heavy medication that could have been avoided in TRT phase.
The conversion to e2 is specific to each person, it is mainly genetic. Just like the body's reaction to X free e2.
So according to this there is only the amount of testosterone injected and bodyfat that can influence naturally (please keep it low).
And maybe daily injection (or EOD) to avoid spike conversion with test E.
Another solution to avoid peaks would be the use of testo undecanoate as a base. But first you need to know the dose that suits you perfectly for your "TRT+". Because that any dose adjustment with Test U takes a long time.