i think you'd benefit from running the test and deca for 12 weeks and bumping the deca to 400mg/week. i think its a solid cycle, just run the adex throughout. make sure eat enough on deca.
Personally, I would run the test two weeks past the deca. And if you can get some Winny do the Winny for 6 weeks and run it two weeks past the test. Start PCT just a few days after your last day on Winny. This will give your body 4 weeks to clear out the deca and two weeks to clear out the test cyp which will help PCT tremendously. Not to mention the Winny will help shed a lot of that extra water you’ll be carrying from the Deca. Run your HCG the last two weeks along with your Winny.