Arma 3 Breaking Point Exp (Points) script
Title says it all.

I dont play BP, but here is my best guess. I think since the variables change so often that no single script would work for any length of time. You would need to have the knowledge on how to read server files and find the variables regarding XP, then edit your script to work for that server at that point in time.
^what JME said. Even if the variables don't change, it's best to be able to read the mission files and be able to find what you're looking for than coming here to ask all the time. It's not as hard to read/write SQF as you might think, though. The reason why everyone says 'script kiddie' is because even little kids can pickup on SQF straight away. It's very reminiscent of lua which is probably the easiest programming language you can ever learn.