As far as I know dosing of HMG is alot less than HCG, it seems general consenses that its best to do your HCG at 250IU a day, and from what Ive read its 10 to 15IU a day of your HMG, I dont know what your purpose for HMG is but its the FSH part rather than your LH, and the only reason for taking it is to increase sperm production, (there doesnt seem to be a direct link between sperm production and testosterone production)
It takes 72 days to create a working sperm and as there doesn't appear to be any research on whether taking exogeneous FSH prevents your natural production, I personally dont come of it, You can take it Intramuscular or sub-q, same as HCG I personally take the HCG sub-q but like to take the HMG intramuscular, I only do this because HMG can aid in preventing infertility and this is the only side of AAS that scares me, I therefore want to make sure that I get what I put in, probably pointless but its peice of mind and its a slin pin anyway so I dont see a problem with it.