It all depends on your experience. If you are new to gear, you don't need the tren. But if you have cycle before, and your goal is to add mass, then sure, you can use dbol in this cycle. Dosing is related to how much you have used before. If you have not used Dbol, start with a moderate dose, 25-30mg will be plenty. And run it for 6 wks. Something like this
1-12
Test E
Tren E
Adex
1-6
Dbol
PCT starts 2 wks after your last shot