Most of the advice regarding Tren and Deca together is just broscience bullshit. Their logic is no different than saying that you should never run large amounts of Deca because it causes prolactin issues. Lots of guys run super high amounts of Deca with no problem, same with Tren. 2 compounds that work well on their own don't suddenly become the boogie man when you mix them together.
And about prolactin in general, there's a reasonable amount of cause to believe that prolactin issues from 19nors is bullshit as well. On this board in particular, I think it was Psych that has been very vocal about not using meds to control prolactin and just using an AI to keep estrogen under control. Prolactin meds are serious medications meant to treat drugs like Parkinson's disease, and are not to be taken lightly. The basic idea is; if one keeps estrogen u set control, prolactin will not become an issue. After having run well over a gram of Tren a week with only an AI for ancillaries, I'm inclined to agree. Just control your estrogen and you'll be fine. For those that are sensitive to estrogen, look at the lower Testoterone, higher 19nor method of cycle dosing.