Assuming Kabuto succeeds in creating enemity & distrust between edo Madara & Tobi, and both turn against each other,
Edo Madara has EMS+Rinnegan & following jutsu
*Amaterasu
*Blocking Technique Absorption Seal
*Fire Release: Great Fire Majestic Annihilation
*Fire Release: Great Fireball Technique
*Meteorite Technique
*Preta Path & probably other paths
*Susanoo
*Tsukuyomi
*Wood Release Secret Technique: Nativity of a World of Trees
*Yasaka Magatama
*Tools
Gunbai
Kama
Susanoo Sword
Tobi has Sharingan(3tomoe) in one eye & Rinnegan in one eye &following jutsu
*Chakra Chains
*Earth Release: Hiding Like a Mole Technique
*Izanagi
*Outer Path
*Six Paths of Pain
*Soul Removal
*Space–Time Migration
*Summoning Technique Demonic Statue of the Outer Path
*Tailed Beast Extraction & controlling Technique
*Tools
Chakra Receiver
Gunbai
Kusari Sword
Terrain: current battlefield.
So who wins?
Edo Madara has EMS+Rinnegan & following jutsu
*Amaterasu
*Blocking Technique Absorption Seal
*Fire Release: Great Fire Majestic Annihilation
*Fire Release: Great Fireball Technique
*Meteorite Technique
*Preta Path & probably other paths
*Susanoo
*Tsukuyomi
*Wood Release Secret Technique: Nativity of a World of Trees
*Yasaka Magatama
*Tools
Gunbai
Kama
Susanoo Sword
Tobi has Sharingan(3tomoe) in one eye & Rinnegan in one eye &following jutsu
*Chakra Chains
*Earth Release: Hiding Like a Mole Technique
*Izanagi
*Outer Path
*Six Paths of Pain
*Soul Removal
*Space–Time Migration
*Summoning Technique Demonic Statue of the Outer Path
*Tailed Beast Extraction & controlling Technique
*Tools
Chakra Receiver
Gunbai
Kusari Sword
Terrain: current battlefield.
So who wins?