Its not a bad mix...It all comes down to the MGs used.
I have taken up to 100mg of Winstrol (winny) ED and 80mg of Var (not together), so if he is taking 50mg of each along with masteron, all is fine.
As for adding Test, the masteron will be the androgenic compound that will keep the libido up. It is no different than adding proviron.
I have done a proviron/anavar cycle and loved it. No libido issues at all.
I dont like Winstrol (winny), as it is really hard on my joints.