Zer0CooL is plvling at basilisk with a botting program, and using speedhack.
And as you can see she also have a autostigger (which means he is also using a kind of botting program), named |Death~AngeL|.
If you look carefully when im dashing the stack the 130 speedhacking archer doesn't react at all, and when I'm dashing her autostigger he just keeps sitting down to regain mana.
To see that Zer0CooL is speedhacking you can just look at the purple tao that's jumping around aswell to compare the speed.