BPT- I was just trying to keep it simple, as I use to be a supplement whore in the past. I did manage to get very lean using some of those things. BCAAs surely helped me stay lean and keep strength. From my experience in bulking, which I have to say is limited as I'm only 5'9" at 185-190, calorie surplus and protein intake has been the most important part. I surely went above 10%bf, with a bod pod measurement of 19%, but the weight barrier was my goal of beating.
OP- This may not be try at all, but outside of things like healthier gainer shakes and calories (plus health supps like Vit. C, fish oil, herbs, etc), I tend to think of supplements helping th most when trying to lean out. If you dont have a lot of cash to blow, just eat good food, and if you don't have any issues with money I personally would get some really great food, all depends on your goals though. My biggest piece of advise is keep your appetite up, because if you lose it the bulking will suck, more. good luck