
avr |

You want some armor, right? +1 spell storing would be nice. Maybe a mithral chain shirt.
A 1st level pearl of power or two, or maybe some consumables, would be seriously useful for your maguses' endurance.
A handy haversack is always useful, especially if you dumped strength or if you got a lot of different consumable items.
A ring of sustenance is good if your GM likes attacking your party at night.
A cloak of resistance and/or a belt/headband which boosts your favorite stat are as good for you as for anyone.
If you want cool, but not necessarily the most practical items, you might look at a gray bag of tricks, or a wayfinder and an ioun stone, or gloves of reconnaisance.

chuffster |

What's your arcana situation? Are you going for straight up shocking grasp damage or do you do a lot of debuffing?
avr hit the staples. There's also the ever-popular jingasa of the fortunate soldier. On the economy side of things a masterwork skill kit and cracked ioun stone can give you a +3 bonus (2 circumstance, 1 competence) to the skill of your choice for 250 GP total. I believe the PFS standard is no more than 9 skill kits.
If you're using static resonance rules for ioun stones then a clear spindle stone in your wayfinder is a nice security blanket.
If you really want to be Batman you could splash out for fogcutting lenses or a goz mask and go nuts with obscuring mist. The rest of your party might not like it so much, though.