Well, at this point, you have already been on the Deca for 5 wks and it is going to really start showing its effect now. The main reason that I would suggest NPP is becuase it would have worked faster than the deca, to get progress moving more quickly, while you waited for the EQ to kick in. But at this stage, you have already passed that window. The deca should be close to being as saturated as it can be, given your dose. So at this stage, I would just keep going and get the most out of it that you can. Then next time, if you wanted to give it a try but do things a little different, try the Sust/NPP/EQ combo. But for now, just focus on making sure you are getting in the best diet you can for your goals and train with as much intensity as possible to get the most out of the gear you are running. Good question though.