Sorry for intervolving, thanks you for saving that user's page!
However, in my opinion the best way is contact local admin first, we don't have extra ability, so undoing vandal's version in a row will have no result (since he can undo your version too) and can't stop him completly!
By the way, Rollback script isn't the good tool to use, thought it can revert vandalism quickly, but it's easy to cause confusion, especially if you're reverting vandalism in other fandom site, I ever see that someone is blocked by local admin for misunderstanding because he/she use too much rollback script on that wiki, you can see more detail in VSTF:policy, good luck with it！
I used the script to do it quickly, I had to do was go to his special contributions and press rollback. But then we also know that part of the VSTF member are also admins in Wiki Centrals, trivial examples: Levithan 89 of the Community Wiki it, Noreplyz Community of Central and others.