The different legendary weapons of the sage of 6 paths weere stated to be dangerous to normal people. Raikage Ai stated that those weapons drain chakra at an exponentially high rate and the ony reason why the Gold and silver brothers were able to wield 2 at the same time was thanks to the 9 tails chakra. Even Tenten almost passed out from using just 1 of the weapons.
On the other hand Darui could use 2 of the Sage's sealing weapons, while also doing some flashy jutsu.
How is this possible?