As far as a natural stack goes, a good place to start is covering your basics (creatine, betaine, etc), with something like PowerMax XT. Phosphatidic Acid (PA) is also great, and can be picked up for a very affordable price from lecithin granules, which also gives you some extra calories and fat for bulking. Neither of those have to be cycled, but are great additions to a bulking/mass stack. From there, I'd consider looking into MassMax XT for bulking, as I've found it's very good for bulking and noticed increased appetite and weight from the bottle I used for the beta-test log. That should cover your bases and help with putting on mass in a few different ways, and isn't 800 supplements to the point where you're well past the point of diminishing returns and just spending a ton of money. I'm currently using all 3 right now.