For a start if you mix the deca and the test in one syringe that should take away some of the pain, theres no real need to taper the amount of gear just stick with a set amount all through the cycle and i would be looking at a minimum 10 week cycle with deca/ test 400.Imo you would have been better with a single ester test like cyp or enan since this is only your 2nd cycle. Do you have your anti-es and pct in place.