I know I have definitely seen Xaolan do great damage with her star skill although with crit. If you are able to hf her, give her a lot of int and have her star skill maxed her damage can be very high. I've never seen images or a video of her star damage though sorry, only of her rb skill. I'm sure if you ask in your server someone will be willing to show off their Xao and show you xD But of course you'd have to ask if their Xao had been fed or not..