The tailed beast wouldn't cooperate with him and I highly doubt that would happen anyway...sasuke is useless sakura is more relevant than him right now lol
He is strategically using himself as a diversion so Nardo can use the time she is distracted with taking his hits and one shotting him to attack, is your head that thick??
Hagoromo said that only the Blue Eye Boy will Play with the Tail Beast and thats Naruto not Sasuke and the Great Toad Sage said Naruto is the child of Prophecy not Sasuke. So stop being jealous of Naruto and trying to elevated Sasuke over Naruto its not going to happen.