12 hours is alot, you do realize any prep over 15 minutes for Strange basically assures him victory.
He invokes a thrice powerful shield, nothing will get through it, hell, his normal shield can take supernovas and blasts from Death/Galactus.
Then he hides his body in another dimention and proceeds to go into astral form, no one here can see him while in AF(cept for Hulk, they have a mind link), and he can still use all of his powers.
He then attacks them mentally, attacks their soul and castes any spell he wishes with absolutely no fear of being bodily harmed.
A little time compression here, molecular changing there, a few illusions, a bunch of cyttorak spells and banishment spells and basically he curbstomps them.