If you want my honest opinion, I would suggest that you do not start a cycle until you have read and done some more research. The fact that this is your third cycle and you are asking if Deca and Dbol would be good, worries me. I do not mean that to be a flame, I just think that you need to find some answers and read more. Also, as a pointer, next time lay out everything in your post. The amount of cycles you have done, your stats, how you train, what your diet is like, etc.
As has been said, the very basic answer to your question would be that Deca and Test is a good combo, and you can add Dbol as well.
DarkSide