Youre talking about Rikudo chakra Obito? Or do you really think base obito has enough strenght to breach madaras skin and go into madaras Juubi mind like world in base? Then the fact Bee and sama wouldn't just sit there like madara and let him do that. Plus the fact That was used on madara having the bijuu's locked up, the 8 tails isn't and doesn't look/is in the same form the other bijuu were (defenseless). So that "strategy" is 1000000% out the window. 10000 Ink clones also join the frey and help for counter attacks!Izanagi + Kamui makes this a rather easy win. Bee can't do anything to harm him & all obito needs is is one touch to win.
Even without izanagi & if bee is in BM, if obito absorbs some of gyuki's chakra like he did to madara then he'd have more than enough to warp gyuki away entirely as well, similar to what kakashi did with a small portion of kurama's chakra.
Youre talking about Rikudo chakra Obito? Or do you really think base obito has enough strenght to breach madaras skin and go into madaras Juubi mind like world in base? Then the fact Bee and sama wouldn't just sit there like madara and let him do that. Plus the fact That was used on madara having the bijuu's locked up, the 8 tails isn't and doesn't look/is in the same form the other bijuu were (defenseless). So that "strategy" is 1000000% out the window. 10000 Ink clones also join the frey and help for counter attacks!