Why does my FPS swing between 30-50 in Marvel Puzzle Quest combat?

I was so hyped when I finally fixed this! Before, my FPS would wildly swing between 30 and 50 during team fights, which was a total pain. I first tried disabling all high-end graphics settings, but the game looked so bland and ugly that I felt completely discouraged. I used the GamePP Resource Scheduler to set the priority to Realtime and switched the power plan to High Performance. RTSS showed frame times stabilized at 18-25ms from 22-40ms, while CPU temps held steady at 68-75℃ per Hardware Sensor.