Considering that Max Bulk contains 2 potent pro-hormones in itself,I see stacking Max Bulk with another compound to be redundant.I also see the idea of "double dosing" Max Bulk to be reckless,as well as not cost effective.
With the extra 42 caps per bottle and 20% off coupon,you have a solid cycle there which can be tailored to either bulking,cutting or recomping.The end results are wholly contingent on setting up the ideal weight training,diet and cardio protocol to suit the desired results.
For example,if you wanted to cut and preserve LBM with Max Bulk whilst avoiding joint pain from training on lowered kcals via the "wet" benefit of Max Bulk ,I'd suggest opting for Marc McDougal's Lose Fat Like You're On Crack training split.