Ok so i have been reading about Masteron and it stops estrogen or to some degree to what i understand but as i said im not sure...

Reason i'm asking a buddy of mine in the gym has done this cycle:

(12weeks)
Test400: 1mg every 5 days
Arimidex : 0.5mg EOD

He has told me After the 12 weeks of test he is going to use masteron for 4 weeks. 100mg E3D and then after the 4 weeks he is going to start pct day after masteron?

My question is PCT day after Masteron?
Masteron after the 12 weeks of test ok?
When Should he start his Clomid?

PCT is: 300mg on day 1
then use 100mg for the next 10 days
followed by 50mg for 10 days