Board Thread:Versus Debates/@comment-25122992-20151114124239/@comment-26537507-20151114171857

Most written evidence points towards him being able to use them, even though we only saw him use the Outer Path. He probably couldn't use them simultaneously but there's no real reason why he can't use them at all. The examples where he doesn't use the Rinnegan seem about par for the series, i.e. the plot had no demand for him to use them so he didn't.

Sound genjutsu and White Rage Technique would be a huge pain for Obito, but he has the advantage of being able the Kamui himself when things get too rough. It would need split second timing though, with no room for failure.

IMO Obito can only win if he can Kamuis Kabuto by getting close/surprise attacking. For most shinobi, surprise attacking Kabuto would be almost impossible but Obito's Kamui is too OP. Not to forget that Obito also has Izanagi in case he's losing really badly (not that I think he'll need it).