Do you have any experience when it comes to bug-testing: Yes, tons. I find game breaking bugs all of the time.
How knowledgeable would you say you are when it comes to Runescape/Oldschool Runescape: I've been playing for 15 years, I know everything there is to know about the game.
Runescape username & total level: null opt, main account was banned at 2277 total.
How do you feel you'd be useful in testing Zaros: I found game breaking bugs in atlas.ps and many other large RSPS
How many hours do you plan on spending per week on average testing: 14-30 hours