In a battle royale style combat drawing from the vast wealth of superheroes and villains available, the top five finalists based on their power, skill, and strategy could potentially be:

1. Thanos (Least Likely to Win): Even without the Infinity Gauntlet, Thanos is incredibly formidable, with superior strength, intelligence, and endurance. His strategy would likely involve relying on his raw power to eliminate as many opponents as he can, then using his tactical genius to outmaneuver his most formidable foes.

2. Thor: Armed with Stormbreaker, Thor has an unmatched destructive power. His strategy would likely revolve around maximizing this raw power, attacking from a distance with lightning and energy blasts when possible, and moving in for the kill with Stormbreaker when necessary.

3. Doctor Strange: With his vast mystical knowledge and powers, Doctor Strange is capable of manipulating reality, dimension, and time. His strategy would largely involve defense and avoidance, keeping his distance from combatants while neutralizing threats with a wide variety of spells.

4. Superman: His super speed, super strength, and near invincibility position him as a great contender. Superman’s strategy would probably involve a combination of offense and defense, using his speed to evade attacks and his strength to eliminate competitors.

5. Dr. Manhattan (Most Likely to Win): Dr. Manhattan is arguably one of the most powerful beings. Capable of altering reality, teleportation, and near omnipotence, his strategy would likely involve simply eliminating competitors with minimal effort. His intelligence and foresight would also mean he can anticipate his opponents’ moves before they make them.

This list may be subject to debate depending on specific match ups and assuming there are no power level restrictions set for the tournament.