I don't know where this 200mg per week is what is used for HRT or that it is what your body is producing naturally came from, but it is far from true. I am on HRT and am prescribed 100mg of test per week which brings my levels to 700 which is if anything on the high end of normal. Now before anyone starts saying "yeah, but everyone is different" 100mg is standard and an Endocrinologist is not allowed by code to prescribe more than 150mg per week, doctors have to explain and have documented proof as to why they are prescribing above 100mg per week if questioned. Sure some "special" clinics will prescibe more, but 100mg per week will bring levels betwenn 500-700.
I personnally bump my HRT to 210mg per week and see great gains in all aspects from it. I monitor all of my blood levels and blood pressure, and run short cycles and go back to my "very high HRT" personal program.
Not to be rude at all, but I have a feeling that whatever gains are made you will lose once you come off; if what you are doing know is not getting you there and you have truly plateaued, then whether it;s training, diet, or hormonal - you will end up back where you are. Now i'll bet that you truly have not plateaued, and to me that is fine if you want to do a low-dose cycle to get you to your peak or above, everyone acts like they were super big and strong before they started and I'll bet that's true with maybe 10%, but not one single person that I know that used or uses aas were at that level.
Long answer=short; yeah you will make some good gains at your level at 200mg/week, but if you are going to shut down your htpa, might as well do a still health safe cycle of 400mg per week and use a taper/bridge back to your normal level. Run your cycle for 8weeks or so and then run a low hrt dose while you start to recover and allow your body to reach homeostatisis while you taper off. Why go from a test level of let's say 2000 drop to 100 and then back up to 600? People say supression is supression and think of testosterone being like a light switch - its on or off, but that is not the case. Your body does not know the difference between endogenous or exogenous testosterone and will try to reach your personnal base. As the testosterone cypionate (or whatever) leaves your system your body will start producing on it own, it just takes several weeks, not stop cold turkey, take nolvadex and suffer for a few weeks -give it several weeks to slowly come back to normal, don't crash and recover - taper and recover. If you are interested I can offer more and an exact cycle plan or cycle recommendations. A guy that I used to work with that is a state champion doesn't do the "typical PCT" but tapers and never has his test levels below 500 at any point during the year.