Probably its better to use drugs that convert to DHT via 5AR, like test, as opposed to orals that are DHT derivatives ( Var, Primo, ect ). Those DHT derivatives may promote hairloss themselves, and 5AR inhibitors like finasteride and dutasteride wont stop that.
A topical anti-androgen would also be beneficial if indeed it does what it claims.
Ive run a few oral AAS before ( Var, TBol ). I would say that Var didnt affect my hair much or at all, where as TBol did ( its very similar to DBol except it cant convert to estrogen ). Tbol also seemed to affect my prostate and made my semen different, I think it is more androgenic than Var.