At best, I would expect that your test level after recovery will be similar to they were before you went on gear. Being on HRT for a year is going to make it even harder to recover to that baseline. Still, I don't want to discourage you. If you want to give this a try, more power to you!! Worst that can happen is, you will lose some muscle, but that can be gained back quickly once you are back on HRT. 

Heres what I'd change. Start your HCG now. You want to use it now, to kick your natural production on, so that when PCT starts, your body is already used to producing test. 250iu to 500iu, 2x wk, leading up to the start of PCT. As for the arom vs adex, there is no need for both. Arom would be my choice for PCT. 12.5mg ED along with your clomid and nolvadex. Careful with the Proviron, as it is actually a steroid and may have an impact on recovery. I've known guys that use it, almost as a bridge to keep libido in check, while in their PCT and off periods, but it isn't going to help recovery.

As a general note, coming off isn't as bad as some people think. We can build a strong mental addiction to AAS and to the size of our muscles. So much of it is ego based. Remember that muscle is always temporary. We all have to come to terms with reducing size at some point, if we want to live a long healthy life. And if you go back on HRT, you'll gain it all back faster than you might think. The rest and clean out time might even do you some good and make you more receptive to your next cycle.

Best of luck. Please come back to the QA and let me know how things go. I bet a lot of fellas here can learn from the experience you are going to have coming off