Damien Thorn vs Michael Myers,Jason Voorhees and Leatherface

Damien Thorn(Omen)
-have some satanic powers and help devil
Michael Myers(Halloween)
-hard to kill
-strength
-kitchen knife
Jason Voorhees(Friday 13th)
-hard to kill
-maybe immortality
-machete
Leatherface(Texas Chainsaw Massacre)
- Texas Family help
-chainsaw

Unless the devil himself is actiely aiding Damien, the killers... well kill him

If the devil is allowed to do Damien's battle for him, he solos.

So it's the child Damien only?

Team can take this. Though Damien's Final Destination style kills, thanks to Daddy should mess them up.

Though thanks to the OPs scenario the fight takes place in the VS arena.

A large, flat battleground were Damien is just a kid on a football field with no convenient objects to decapitate his opponents with.

Team kills Damien. He's screwed. Two of these guys are zombie tanks.

Even if Satan lightning strikes a pole off the edge of the arena to conveniently launch through one of these guys it wouldn't matter.

The kid is gonna get butchered. Though only the Daggers of Megiddo can destroy the Anti-Christ. One physically exhausts him and the rest are necessary to kill him.

Without these weapons Damien can't die. But KO is inevitable which is a win.

Team wins/