For Field pvp as in open field or as in "Fielding" Pvp Lol 
Seen quite a few. Good old standard 
120 Mage
120 Eval 
120 Resist
120 Parry 
120 Wrestle
120 Med 
Defensive + 30 sdi gives you more offensive capability than old scribe mages. 
More Offensive 
120 Mage 
120 Eval
120 Resist 
120 Wrestle 
120 Med 
100 Scribe 
20 Focus 
40 Sdi for some high Damage Spells 
My Personal Fav, but you have to use a mage weapon 
120 Mage 
120 Eval 
120 Resist 
100 Scribe 
100 Alchy 
60 Poison 
100 Meditation 
Greater Poison, not the best at Interrupts, but Better than regular, 40 SDI, Your Pots do more for you, and your Explo Pots/Conflags/Super Novas Reallly Hurt.