Looks great, but just make it simple and run the Deca at 400mg.
Another idea would be to extend the Test to 16 weeks. Once you drop the deca at week 12, add in something like Winstrol or Anavar for the last 4 weeks. This will allow most of the Deca to clear your system before PCT, and once the water drops off.. by week 16 with the Winstrol you will look sick.
1-16 Test E - 500mg/week
1-12 Deca - 400mg/week
1-4 DBol - 30mg/day
13-16 Winstrol - 50mg/day