I see Tren and Mast as two completely different sorts of compound, mast is a cosmetic compound, it'll dry you out and thereby give you a crazy look if you're lean enough therefore its purpose is already served by the winstrol in your cycle, Tren is an incredibly powerful muscle builder and fat burner which will dry you out a little as well...
I like mast better than winstrol just in terms of milder sides and preference for oils over tabs but in this case winstrol makes good sense because you're already shooting a large amount of oil with the primo in there...
Your cycle with 50mg tren EOD has serious potential...