Re: how many akatsuki would it take to take down EDO MADARA
A: Pain Kakuzu Itachi Deidara
This way Madara faces multiple enemies. Kakuzu can split his hears, Sasori with many puppets, Pain with all paths, Deidara in the air to bomb him.
Basically edo Madara must watch every side of him. Meteor wont kill any of these. All has defenses to guard against.
Offensive, Kakuzu can match Madaras fire jutsu, when he combines wind+fire element.
Itachi needs just one hit with totsuka, and he is an uchiha, so he may be able to see through many attacks. Thus he will be the strategist as well.
Pain can seal as well. Has hi use of gravity to be a huge advantage. It's not a jutsu Madara can absorb, and frankly I don't see him resist the pull, unless he uses PS.
Deidara has nanobombs. If Madara isn't lightning affinity, he has no way to guard against it. The bombs are nanoscale, thus they aren't visible till they are in a fluid (i.e. his blood). This will destroy him, and leave him seal able for Itachi or Pain.