IMO, It depends on how much TEST suspension you're running, not so much the Tren. Tren has other issues, but not aromatization.
As a guideline for Test: 12.5ed up to 500/wk, a little more up to 750, 25mg at a gram. Bro-scietifically speaking, of course. It works very fast for me; in about 2 days and Im holding no water. If you're still water logged after 4 days, raise it up a little. I use my face as an indicator, not abs, unless Im below 10%. This way I dont confuse being a fat ass as "holding water".
BUT, in my experience, Aromasin is really subjective. I need WAY less up to 500mg T/ew with Longer Esters. 12.5 about every 3 days. When I did 12.5 ED at 500wk, my libido was shot for weeks and I felt like total shit. But you'll aromatize more with Suspension, so better to be a little higher and back the Aromasin down if you feel like shit.
You only have to worry about the E sides from the Test suspension, not the Tren. Tren doesn't aromatize, but can up-regulate the PG receptors in the PRESENCE of Estrogen. So, best to keep the E2 from the Test on the low end. Prami offsets the sides from Tren.