....madara cant use narutos method. naruto used chakra arms and SM to find and rip out chakra rods. how is kyuubi holding down 6 bijuus long enough for madara to get up there?Madara wins, mid diff. Kyuubi > 6 paths. We already saw Naruto with half the chakra of kyuubi beat the 6 paths.
Madara would obliterate him his 6 Bijuu and the Mazo with the combined power of Kurama and Perfect Susanoo, though w/o a sufficient counter to Kamui, he would win. Bijuu Dama spam could work since it covers the whole battlefield, isn't hurting Madara through PS, and Obito can't turn tangible otherwise he dies. Though it depends on how long the explosion lasts and how many he can spam in a 5 minute period.