Event is impossible

In this game's event, my highest rank is 3rd place. 1st place is almost impossible. Even after watching nearly 80 videos and consuming 1600 materials, during the 2x, 4x, 8x, 12x, 16x, 20x discount periods. And looking at the money rewards each time. I still can't surpass the computer-set opponents. At least give us a skill that permanently increases efficiency during the event? The main story skills are shared with it, and the result is... With double rewards for extending time and increased reward ratios, the level cap still can't compare to the computer.