Lets just say you have a 144hz monitor (just like me), and need it for no choppy gameplay. Would it be douable for speedruns or would it be considered as cheating?

Well... Usually it is considered cheating and I wouldn't be surprised if the mod wouldn't allow it.

FPS unlocker can affect cycles in obbies and can also just make jumps easier to do Limit to fps is 75 so dont go over that