issue is that the roids will put pressure on your cardiovascular system while the beta blocker will try to do the opposite.
theoretically,you would be more prone to (acute) low blood pressure/fainting/low exercise tolerance while exercising while on those two together, because using aas will increase fluid and therefore peripheral demands on your heart, while the b blocker will decrease your maximum heart rate/contractility and therefore lower the maximum amount of work your heart can do. therefore, if you find yourself in a situation where your heart HAS to beat fact and hard, it cant, meaning you perform like shit, and maybe get some low blood pressure and faint or feel nauseous (shit performance almost certainly, the second ones....maybe)
also, i havnt looked up to see if there are any interactions between your two orals, or to see if you will get higher levels of any of the drugs while using them all concurrently, since im tired just now and will sleep
cheers