Since you are an HRT patient, there is no need for PCT after your cycle. At the end of your cycle, I would give a couple wks to let the gear clear, and then return to your HRT dose. Considering your position, age, and cycle experience, I think this would be a perfect 2nd cycle for you. In fact, as I was gathering your info in the begining of your question, that was what I was going to suggest, even before I got to your proposal. I would use a low dose AI through the cycle. If you find that the deca effects your ability to perform in the sack, you can add some caber at .5mg 2x wk. You are using a very conservative dose though and I wouldn't expect you to need it. 

One thing I would suggest doing, is getting your lab work done on a regular basis. Sure, you don't need to worry about recovering your natural test production, but you do want to make sure that your kidney and liver function is good, as well as check that the AAS aren't effecting your cholesterol. 

As for anavar between cycles...well, that wouldn't be "between" anymore, would it ;) But get your labs done regularly and use them as a guide, as to when you are ready to go back on. Maybe you want to do this test/deca/dbol cycle. Take a break. Then do labs in a couple months and if you are good, add in some anavar for awhile. As long as you keep your gear doses reasonable, most guys can stay pretty healthy. Just know whats going on inside of your body