Well, my experience with dose is limited. I've never run it at a dose that felt too high. I wouldnt go over 800mg. Keep in mind, Im making this suggestion FOR AN ADVANCED ATHLETE. I'm putting this in caps for anyone else who might be newer to gear, that happens to read this. For a newer steroid user, 4-500mg would do just fine, along with some test.
I found that each time I've run it, I've upped the dose and it's kicked in faster than at the lower dose. This is beneficial since it takes a good deal of time to start working. If possible, I'd consider running the tren for 8 wks and reduce the dose if needed to stretch it out that long