Increase Reflexes/Combat Sense, Heal/Magic Fingers, Powerbolt/Manabolt.
You likely aren't going to be able to easily sustain both IR and CS, so pick one or the other based on your personal preference.
If you have a good healer, you can skip Heal, but it is still handy for the First Aid + Heal combo. If you drop Heal, get Magic Fingers or vice versa.
Powerbolt/Manabolt gives a direct damage spell in your preference of stun or physical damage. Since you have guns, indirect spells are less valuable, though an area spell might still be useful if you don't have anyone that can throw/launch grenades. But because spell slots are limited, a direct spell trumps an area spell for now.