Good joke... 6p is still 2nd strongest ninja in 3v3 battles (arena/gnw) after ronin naruto and really strong solo ninja in 1v1, since he can heal himself to full hp even if he had 1%,each wave mystery, 4targets standart atk, immune and clearing buffs+shield + immobile chase,easily combinable with any support and you want to give him another BT ? maybe kakuzu has amazing damage with full chakra but he is easily counterable (with edo/kimono/susanoo itachi or other cc ninjas) since he is not immune and there aren't many ninjas that can support him. And yes madara will get BT but he isn't that strong as 6p at all fought against him many times but 6p made much more problems than him....