This is pretty much a more serious, Brotherhood version of the FMA OVA.
In an alternate universe, the alchemists have managed to track the movements of the homunculi and move in to wipe out all of them in one go. The alchemists have 10 minutes prep.
Fight takes place inside the 5th laboratory. The strongest versions of everyone from Brotherhood are being used (e.g. Ed with lighter automail, Al still with his metal body).
The alchemists consist of: Edward Elric, Alphonse Elric, Roy Mustang, Riza Hawkeye, Alex Armstrong, Olivier Armstrong, Scar, Maes Hughes (not dead in this one ^^) and 10 generic state alchemists.
The homunculi consist of: Greed, Envy, Sloth, Lust and Gluttony. Each of them have 15 lives each.
After 5 minutes, the homunculi will be reinforced by Wrath.
After 8 minutes, the alchemists will be reinforced by Izumi Curtis, her husband and Ling.
After 10 minutes, the homunculi will be reinforced by Pride (with 20 lives), who has access to plenty of shadows.
Which team is left standing?