8 weeks is too short for long esters. Your Sustanon wont even kick in until week 6 or 7. Why are you stair stepping up an down? Taperring is old school and does not make sense, since we have better AI's available.
Sustanon should be ran at 14 - 16 weeks minimum, and while I have ran Decca, NPP and Tren, I would personally never use Decca for more than 10 to 12 weeks.
If you run any Nandrolone (Tren, Decca or NPP), you always need either dostinex or caber. You run either at 1mg every 3 days starting at week 5 or 6 and through your PCT.
Again, 8 weeks will not help you.
8 weeks would need Test prop and either Tren or NPP.
Also, always run Test 4 weeks past a nandrolone.
Bulletproof
PLEASE DON'T SOURCE CHECK ME. I AM NOT A DR, DIETICIAN OR SCIENTIST. MY ADVICE IS BASED OFF OF ASSUMPTIONS.
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"Whether you think you can do it or don't think you can do it, you are probably right" - Henry Ford via Jay Cutler, 2011 MD post Olympia Loss to Phil Heath