I hate how people put 8-Tails' TBB below Kurama's.
Kurama's TBB are almost the same in power as Hachibi.
Unless he does a Massive one multiple times his size, which most Bijuu could do, they're pretty much equal.
Actually no, Kurama s said to have near limitless chakra and when BM Naruto fired his tbb, that was equal to 5 fully powered Bijuus and the 8 tails was covered in his tails for protection and said Kurama is really strong. Half of Kurama is at least as strong as 5 Bijuus and stronger than the 8 tails. A reason why Kurama said they couldn't win without his chakra, this was while he was recharging.
His Cloak is impenetrable, so I think yes.
His cloak was cancelled out when the rasenshuriken hit him so 2 rasenshurikens in a rom would have finished him. The 8 tails wasn't sure if his tbb cause the scar, maybe when he fired at close range, the 3rd Raikage manage to move from a direct hit and the force caused both of them to be knocked downand the 3rd's jutsu hit himself.