Possible way how to slow Obito down.
I think , that Mighty Guy will use 8 Gates.
But for a short period of time - Gain a power that Surpasses a Shinobi power.
And will almost Rival that of Obito.
Reason - Kakashi tried to step up hes game in the Kamui dimension , but came back half dead.
Mighty guy seeing this will find hes resolve - use 8 Gates.
And actually do something - but the price would be death.