I would think it’d be legal under fair use?
Fair use is a much more specific and narrow thing than most people think, and there’s absolutely zero way this would be fair use. Not making money with it would definitely strengthen a fair use claim, but that’s not the only factor. The other big one is whether it’s transformative, and I can’t see how remaking anything can be considered transformative.
I imagine the best thing would be going long on SP void cascade with a mod drop chance booster. Personally I suck so I do SP Circulus on Lua.