It can definitely be a cruise dose. It's not trt dose. A cruise is what you use to maintain your gains, trt is trt.
I think trying to define a number with these words is silly. People range from zero naturally (hypogonadal) to who knows, maybe 2000, naturally, maybe more, without exogenous T. There are freaks out there who produce way more than the average person, and some who produce way less.
There is bound to be as much variation in our genetic responses to differing hormone levels as well. There are people who would grow tits if they spent 6mo at 1000ng/dl, and i have heard pro BB say they took typical pro BB gear (2-3g) and never needed an AI. When i had my bloods done i was low on TT, free T, estr, DHT, and DHEA. We will see what 300mg does to me. I have heard guys at my local sarms store say then needed an AI for LGD alone, i had no estr sides at all stacking LGD, YK11 and Rad140.
Making blanket statements with anything relatively moderat is stupid. My next bloods may show some scary markers and if they do, i will alter my dose. But they may show everything healthy and if so, im gonna enjoy the same dose im on now, regardless what other people call it, TRT, blast, cruise, it's meaningless.