@5th: Yeah but that's Ninjutsu which he is immune to. Gin's Bankai is not the same as a jutsu.
@phantomrant: Shouldn't Gin's Bankai and Aizen's KS give them a chance if they use them together???
@GeneralVan: Sensui has mountain level shock waves and better speed. Juubito's only hope would be a Bijuu Bomb. Also keep in mind that EOS Yusuke, Hiei & Kurama>>>>>>>>Sensui. As for Bleach Sensui or Juubito couldn't solo all at once. The right team with enough hax could put them down.
@taichokage: Well the Gates only work for a brief time. Overall Pain is still stronger and could win via Chibaku Tensei or Shinra Tensei. It's just that if Guy is bloodlusted and Pain is not then Guy is going to go for the Gates right away. The speed difference would just be too much for an unprepared Pain to handle.