Queen B for PvP if you have her. No matter what Mage you use you need a high preciseness (at least Lv 9 but yo begin to see the difference with lv 10).
What about Maria? I hear conflicting reports. I tested this a bit with Preciseness 12, on and off. Seems to help, but the difference is small so I can't be certain. For Shayd it is night and day difference, so I really wonder if it has any real effect on Maria