Defend Earth
The X Men are at full strength. Everyone is as they were at the end of days of future past. Cassandra Nova is with them and she has reconciled with her brother. Together they lead the X Men. Jean Grey is just discovering her powers as Dark Phoenix. Then it happens. Several different evil forces all attack Earth at once, all of them are out to destroy mankind, to rule the planet for themselves. The X-Men must defend Earth against the invaders. Here is a list of the invaders. Each invader is at full strength and has all their resources, they are not fighting together, they'll fight each other if that's what it takes.
Thanos
Darkseid
Pinhead
Surtur
Apocalypse
Now, with the Invaders all fighting each other, and also trying to destroy the X-Men and mankind, who is the last team standing?