2 statements struck me as I read through your entire thread here and specifically looked into your words along with allk the advice to you. "I eat great" and "not looking to bulk up at all".

So I guess let me stab the "I eat great" comment first. Great for what? 15% BF? Yes,that's what you eat great for. So this is the time someone will post up their diet to prove they eat great and it usually means one of 2 things. That's the diet they wish they were eating or they are actually eating it and its not the diet for them. You mention plateau and that word means little more than "I need to change something or change everything. Change and confusion is how you avoid plateau and that means changes in gym and kitchen.
Ok let me hit the mkost important thing here to me which I had in mind that you are 23 the whole read, not a deal breaker but these words jumped out as I read and had all the other factors in the back of my head, "not looking to bulk up at all". So in my view the test only cycle is of no need here. Your natty test is verry good today so simply adapt the diet you will need after the cycle anyway which is the diet you will need on cycle along with your hard work and it all happens for you. Its silly to me to run test to not bulk at 23 yrs old when you can not run test and not bulk and everyone knows, diet controls the bf so a higher than normal test count does not benefit the vgery goals you mention yourself.

I would love to help break your "plateau's" with you but just running a test cy,le is not the answer. Nolw you m.ay come back and say it was later and fail to mention, "oh yeah, I worked out harder, really dialed in my diet much better than the diet I achieved 15% bf on and really just started living towars my goal. So my solution is adapt to your goal now in the way you would if running a cycle and you will achieve in the same 12 weeks you would run test. Your natty is likely awsome brother, , you change the diet. With some carb manipulatin and alternate training styles to add the confusion and 8n 12 weeks you make mega changes and realize the only reaL plateau was your thinking.

Everything looks good. However, i would stay away from hcgenerate, i really don't think it will benefit you—IMO I think it would hurt you instead of help you, if studies are correct with hcgenerate you will also have extra estrogen floating around also, so you got some sides there some bloating and things of that nature. Time on = time off. If you do take the hcgenerate I would take some Arimidex maybe .25mg e3d or E2d jut to be safe.

Also make sure your Diet is in check sound to me you really want to get that BF down and put on some good weight. If I were you this is how I would roll.

Cycle 1
1-12 Diet,Deit,Diet Gym Gym Gym –get your body working at its beak
12-24 Test E @500mg a week (Monday/Thursday)
Arimidex .25mg ED(is fine) to keep bloating and estrogen in check
If you have HCG 500iu a week
PCT 15 days after last shot take Arimidex up until you start PCT.
Clomid 100/100/50/50
Nova 40/40/20/20

Now 3 months off Diet Diet Diet, Gym Gym

Cycle 2—Now that your body’s BF is down Masterone will make you look like a beast as long as your diet stays in check.(this will cut you up add some strength—not a major mass builder—if you want mass well that’s a different cycle)

1-10 Test E @ 250mg a week (Monday/Thursday)
6-11 Masteron @ 400mg a week (Monday/Thursday)
Arimidex .25mg ED(is fine) to keep bloating and estrogen in check
If you have HCG 500iu a week
PCT 15 days after last shot take Arimidex up until you start PCT.
Clomid 100/100/50/50
Nova 40/40/20/20
You will be beastly in a few months.