HRT combined with cycle

It seems that I no longer produce my own test and will be on HRT for the duration. My Doc prescribed 5g of Androgel which my insurance denied. I paid it for 2 months and decided to just do it on my own.
I am planning on a Test E/Deca cycle at the moment at 600mg Test and 500 mg Deca (I have joint issues).

My question, has anyone in my position bridged their cycles with 100mg EW test to maintain test levels? I will do blood 2-3 months off cycle to see what 100ml is doing for me.

Stats are: 49y/o, Maybe 10 cycles over my lifetime. 6'3", 225, 12% BF.