3 months is a very long time to be taking 1-AD without a break for your liver. There's not a lot of point taking 6-OXO with it. The 6-OXO is a suicide aromataze inhibitor and, since 1-AD doesn't aromatize, you'd be wasting it. Taking 6-OXO after a cycle should be adequate to get you up and running again.
I'd keep the 1-AD cycle down to 6 weeks tops and then run a tapered dose of 6-OXO for 5 or six weeks starting with 600mg per day for the frst week before touching the 1-AD again after maybe a further six weeks. Another common cycling is 2-on and 2-off. It's reckoned that if you keep the cycle to two weeks you don't get shut down. Some 6-OXO between the 2-weekers should keep everything running. That should get you a decent boost to your workouts but probably won't pack on huge amounts of mass. I don't know how long people have run such 2-week cycles for.
You'd probably be better off with something like anavar than a prohormone. You have to take all the same precautions and risk all the same side effects as with a real steroid, anyway. I guess you're aware that 1-AD can convert to DHT with associated sides of hairloss and prostate enlargement.