1. Gamabunta's Summoning: Gamabunta, known as the Great Toad Sage, is a powerful user of ninjutsu and could have aided Minato in defeating the Akatsuki.

2. Finding Orochimaru: Orochimaru, a former friend of Minato and a member of the Legendary Sannin had opposed the Akatsuki after leaving them. If he had teamed up with Minato and used the Reanimation Jutsu to resurrect previous Hokages, they could have easily defeated Pain.

3. Reverse Summoning Jutsu: Minato's skills in summoning jutsu with Mount Myoboku's toads could have given him an advantage against Pain. Each toad has unique abilities that could aid in battle. Minato also possesses the Reverse Summoning Jutsu, allowing him to retreat and strategize.

4. Returning to Recuperate: After defeating three Pains, Minato was ambushed and gravely injured. Despite this, he could have chosen to retreat and recover, deducing Pain's identity with his comrades.

5. Fighting alongside Naruto: Minato's battle against Pain showcased his strength, and if he hadn't been caught off guard, he could have inflicted severe damage. He could retreat with Naruto to Mount Myoboku to train and increase their chances of victory.