The secret to setting records in video games is to go for oddly specific ones that nobody else is competing for. I recently decided to see how much physical damage I could get out of Qiqi, or more specifically, the passive damage that Aquila Favonia deals when Qiqi takes damage. This is the best I could manage. I can't find evidence that anybody else has done better from this very specific damage source, but would love to see that if it exists.