Superman and Thor run the gauntlet
This is King Thor and Superman enhanced by a Blue Sun's rays.
They get no rest in-between fights (although Superman's sun boost never wears off) and they are willing to kill their opponents.
1. Thor Girl and Thunderstrike
2. Sentry and Gladiator (Fully Confident)
3. Firelord and Beta Ray Bill
4. Silver Surfer with the Carnage Symbiote (Cosmic Carnage)
5. Thanos (No Infinity Gauntlet)
6. Berserk Genesis-Vell
7. Mephisto (In his own realm)