I wouldn't stack bulbine with any test booster or anti-e. It does both, and it is temperamental itself. Your only experimenting should be in the dosing of the bulbine. Personally I tried the original phytoserms-347 which was my favorite supplement to date. I think it was spiked with something though. One cap first thing AM and one cap before bed seemed to do the trick. With tropinol I think I needed 3 caps, but I didn't like taking it at night due to the caffeine. I tried a different bulbine supp at 2 caps but none of them were as good as phytoserms-347 for me personally.
Why would you want to take something else? Trying to get more than 300% test boost? Take an anabolic or nutrient repartitioner instead.