You do know Madara even said it was like playing with little kids or something like that, he wasn't serious in that fight. And yes Oonoki's Dust element can break Susanoo, it consist of 3 elements and the only thing you could compare its power to is tbb and the black dust element like jutsu Obito use except that Obito's one is stronger since it has at least 4 elements from what Hiruzen stated.So I'm starting to think that the kage actually WERE Strong enough to defeat Madara but got PNJ'd. I've never seen this argued so here is why.
Tsunade's role would be more of a healer of course, summoning Katsuyu to her allies to remotely heal them.
Ay- I don't think Madara could keep up with his speed... That's like saying Madara = Minato Jonin = Naruto KCM and I don't think this is true. Therefore Ay + Onoki's weighted boulder technique = insanely strong.
Onoki - I really wonder if particle style could defeat a susanoo.. Technically it should so this im leaving out. Just going to add his weighted boulder to Tsunade + Ay.
mei - Kekkei Genkai goddess.. Her acid can melt Susanoo so the Raikage's speed + Her acid could help them get acid to multiple susanoo at once. Can easily counter wood style with lava.. That should go without saying Lava > Wood lol
Gaara - Not a fighter, more like a defender to long/large attacks from Madara. Even use sand to pull madara out his susanoo and break his concentration.
With these skills and in combination the Kage should be able to beat Madara...But given the fact he's Edo that's another story, would need to seal him super quickly.
Anyone else feel free to express your opinions
As for A's speed, Differences between Madara and Sasuke is that Madara mastered the sharingan beyond all Uchihas and only Izuna who trained with Madara and was said to be even with MS Madara and Obito who Madara trained are at such a mastery. So Madara perception skills are far above other Uchihas and sasuke could see A, but it was A not moving in a straight line (unlike Bee did) that made it hard for Sasuke to read but the real problem was that Sasuke wasn't fast enough to react. Madara is fast enough to react to A's speed and EMS has a better Perception skill than MS as well so that also helps in the terms of fighting a speedster.