Superdave has a great suggestion. You can validate Beast's effects if you solo it, if that is your goal.
Personally, I am stacking Beast, Katanadrol and Transaderm for 4 weeks. I have a log which you can check out. Oldgoat has a similar cycle going.
On mine, creatine is a mainstay. My pump is constant. I feel yoked and I am explosive in the gym.
Is it one or more items above? Most definitely, but I knew my goals were about mass, strength and density and creatine seems key.
Good luck with the beast. It is the real deal. Feed it with carbs and drink at least a gallon of water.