There are lots of good options. The right diet is going to be the biggest factor. I could suggest 5 different cycles that would all produce no gains if the diet is tuned in. Or you could gain several lbs of lean keepable mass on those same cycles! So if you have things on track with your diet, have the training in order and are getting enough rest, IMO, an optimal mass gaining cycle might look like this 

1-16

Sust 500mg EW

EQ 400-500mg EW

adex as needed for E control

1-6 Dbol 30-40mg ED

Of course, you want to do a PCT at the end, Brotha! Best of luck. Work hard and get freaky!