[Easy_C]

It's possible to beat them at their own game. You need to strike first with the boss and get in the first word(subtly). Using the classic Alinsky tactic and subtly provoking them can be effective. As crazy as a lot of these girls are it's not difficult to get them to behave in a manner erratic enough to, at a bare minimum, give ammunition to other girls in the office who don't like them. Another point: divide and conquer. You obviously can't do anything blatant like starting rumors but a well placed "reply all" can be surprisingly effective.