Mithril robe from Giran armor shop. Or if you got enough adena you could buy a Sage's Rag from a player, which has more MP bonus and P.def. Its the 2 piece top D robe, but will cost alot more cuz its l33t.
Yea, its 2 seperate pieces for upper and lower body. Shouldnt cost more than 500k in all for both pieces. Sage's Rag is 1 piece of gear that covers upper and lower body, and can cost 1-1.5 mil
Sage's rag is expensive because you cannot buy it from a store, it's also amazingly ugly on a female SO, in case you wondered. Oh and has no set bonus at all.
Mithril robe top and bottom is like 500k from the Giran regular armor shop , and if you get the gloves it has a nice set bonus is extra casting speed and +7 run speed.
The casting speed comes from the +Wit, which will also give you a very slight increase on your rez %. Acyaully it should put you back up to par at 20% because from what i read on the wit modifier sticky thread on this board, the DE caster wit is so low it actaully makes your rez less than 20%. What a ripoff lol!