If i were u i will use 200/300 mgs week of primo and no more than 20 mgs of halo ED (use halo no more than 4 weeks) remember that is very hard on your liver (try to find some milk Thistle and use about 400 mgs ed with halo and for 4 weeks after u finish your cycle).
I don't think that u need Proviron since u already have the strong androgenic properties (without aromatization) of halo.
Proviron is a strong androgen and an anti aromatase but with primo u don't have to worry about that, if u don't whant to stress your liver too much, u can replace the halo with Proviron at 50/75 mgs ED it will give u hardness (not as halo) and mantain your estrogen level low.
Bye
be safe
Body