4thAD- Arimidex for post?
Adex for post? - No, bro. Use Nolvadex, or clomid. If you want to run an AI with it use aromasin. Adex is great while on cycle. I typically run adex @ 1mg e3d. Because of the adex half life you need to spread it out a little so it will do its job controlling estrogen.
No sense running tren and mast together. Personally I would run the cycle at least 12 weeks. Have you ever cycled before? if not, or still a rookie tren is not the drug for you brotha. Run nandralone instead.