Mag-10 and M during cycle?

I’ve been reading some of Bill Roberts’ work and he often suggests that anabolic steroid users take Clomid or another anti-estrogen product during their cycles. However, in the Mag-10 plan it suggests taking M after a Mag-10 cycle during the recovery phase. Why not during the cycle too? It seems like preventing any estrogenization of Mag-10 (even in very small amounts) would be good the whole time.

Thanks a lot!

Mag10 does not aromatize. M is not cheep; save it for post cycle to increase natural testosterone production