It depends if you are just cutting and you see yourself soft.
Then add some Masteron equal to test, then raise every 2 weeks to see how you will look better and find your sweet spot.
Yes Masteron helps with water and as mild Ai.
Atm i m cruising and keep cutting on 300mg test e 100mg ed Proviron 2iu HGH.
Before i was on 150mg Test 700 Tren 700 Mast. Had miserable results, too high doses 400mg Tren 400mg Mast was more than enough for my 2000 cal diet.. And yes doses must rise with time... Jumping to an high dose when you have few muscles will just ruin you.
On next cut i would just run 300 Test E + 300 Tren A.
Or only 300mg Test E + 300mg Masteron.
Masteron gives you also a sense of a global wellbeing like all DHTs.
Btw you can find a good read about TTM here:
http://www.chemicallyenhanced.info/gh15-archive/the-science-of-trenbolone/