By the way, Class-II PH/roids (like Halo) doesn't bind 5-AR, and Finasteride works blocking 5AR to prevent Testosterone -> DHT conversion.
Then, if we take a Class-I (needs 5AR) like Epi/Havoc + Finas (blocks 5AR), Finas minimize gains for Epi due 5AR blocking.
So, the best option to maximize gains and minimize hair loss risk would be: HALO + FINASTERIDE, isn't it??