I'm not a big fan of stacking 2 19 nor's, tren with deca. Thats a lot of proges i one cycle. You may be ok, keping the deca at a low dose. Another issue is, deca is quite a "wet" compoud and not great for running into a show. I would want to cut it out but 4 wks out. I usually run my gear right up to a show, so I would time it out that way and probably use just the andromix right up to the contest. That combo is really about as good as it get, but if you wanted to take it a little further, halo at 20 mg for the last 3 wks would help dry you out and harden you up more, without as much risk of joint pain, as you would get from winny