There is so much confusion in here it doesn't even make sense.
OP wants to run 12 weeks with 2 bottles. 500mgs per week with 2 bottles = 10 weeks, if that since the tip of each syringe holds onto a small amount of liquid.
If you have extra bottles, then why aren't you including that into this cycle? Are you going to do a 10,12,14, 16 week cycle, or what?
You said you have Clomid and Nolva for PCT, but since you don't have HCG, you are asking to run Msten?? This makes ZERO sense. Msten is nothing but a legal steroid that is suppressive to HPTA..meaning if you run it at any point, it is suppressive.
Can HCG work for PCT? Yes it can but people often forget it has a negative feedback loop to it. Besides the fact that it releases LH, FSH and a host of other hormones, the fact is it enlarges the shrunken testes so they begin producing again at a normal or close to normal level. Think of it like a temporary JUMP START to a dead battery. If you jump start a car and the battery is half dead it will run like ****. If you jump start a fully functioning battery it will run just fine. HCG post cycle seeks to enlarge the testes as well as produce a variety of hormones that stopped being released when you began injecting testosterone.
You can run your SARM aka clomid, torem, or whatever it is you choose to try and re-establish natural HPTA, but the truth is until the HCG is out of your system, this won't happen. You certainly will elevate test levels, but if you are still "suppressed" you are not turning your own bodies natural testosterone back on. Then since your test levels are elevated, your estrogen levels are elevated. This is what the nolva is for. Or any anti-e. You don't need to overcomplicate it. Clomid and Nolva are just fine choices. Everyone here is going to say, try this one, try that one...If you want Clomid and Nolva, stick with them.
Also, sustanon regardless of the brand usually has a cyp or enanthate in it. Guess what, these esters have a 10-14 day half life...So you don't ever start PCT immediately when you are using Test, unless it is suspension or Prop. Usually you wait 10-14 days. Because even if you start PCT, you have testosterone circulating in your body still..and it is still suppressing your natural levels. It is still absorbing into your bloodstream. So, the fact is, the testes will still be shut down, because your brain is still signaling them that you have endogeneous testosterone in your system..because you do.
Figure out your cycle length. If you are going to do clomid ,nolva, or hcg then begin it 10-14 days AFTER your last shot. You can in theory start your nolva at any point if you are seeing pre-gyno symptoms, so it depends, do you see symptoms? If not, wait and start PCT all at once.
Also, the only true way you will know if your levels returned fully after PCT is to get bloodwork..and have consistency. When working in the hospital for years, i personally spoke with several endo's who all confirmed that natural HPTA can take anywhere from 2-12 months to return to normal. In some steroid or PH users, it will not return and the user will require lifetime HRT in order to have a level "in range" from that point forward.