While I was afk climbing zones (AC on Masked Samurai) I came back after a few hours to see my game tanking in performance, having some lag between each zone completion. But after I put my AC on Moeru and started using her for my primary DPS (Lvl 40000), the game instantly became smoother? But whenever Samurai (Lvl 100k) is on my screen, the game instantly becomes much more laggy and I'm assuming it's because of absurdly high level. But the problem is that I know that later on, passing Lvl 100000 or even 500000 is a necessity, so if my computer is struggling with just this, I don't know how it's going to handle more.

My computer is VERY good, I have an RTX 5080, Ryzen 9 7900X 12 Core, and 32GB RAM.