Proving you belong here with the big boys isn't much of a justification for using tren right off the bat. The reason people don't use tren, or any compound for that matter, on top of test for their first cycle, is because otherwise, how would you ever know how you react to the different compounds, had you not taken them separately? You may say you've already experienced test, given that you're on trt, but you have not experienced it at your proposed 600mg/wk, which is quite a bit off from the 100-125 mg/wk that your body is used to. What will you do if you get gyno? I don't see any caber on your ancillaries list, tren is the culprit for prolactin-induced gyno, which is quite common. Sorry if I am coming off as blunt, but you are also pointing two different ways in your post about wanting to see quality muscle and strength. If you wait to cycle at a more appropriate bf%, you will be able to transition to a lean bulk, and the drugs will be able to take advantage of the extra carbs and calories that you will be taking in, thus creating MUCH more muscle and strength, being that you would be eating at maintenance/surplus as opposed to a deficit.
Just some thoughts.