Use whatever spells he has that can help the party, whether utility or damage. Don't forget drain bonded object to reuse spells. He can also change prepared spells in 10min. He also can make alchemical items on the fly with infused reagents (4 per day).
If all else fails:
For 2-actions:
[dice=telekinetic projectile]1d20+12[/dice] [dice=bludgeoning/slashing/piercing]4d6[/dice]
For 1-action (and if he still has focus points):
[dice=hand of apprentice (+1 striking staff of divination)]1d20+13[/dice] [dice=bludgeoning]2d8+4[/dice]
Game Notes:
Provision: scroll of dispel magic (3rd)
2 x scroll of Revealing Light
scroll of Force Barrage (3rd)
Major Factions Envoy’s Alliance: 2
Grand Archive: 64
Horizon Hunters: 2
Vigilant Seal: 2
Minor Factions Radiant Oath: 0
Verdant Wheel: 0
All Faction Reputation Total (Sum of the Above) Reputation: 70
Purchased Boons Grand Archive Champion, Improved (Faction) (0+8 Fame)
Wayfinder (Item) (2 Fame)
Esoteric Wayfinder (Item) (2 Fame)
Professional Hireling (+12, Diplomacy, Government Lore, Legal Lore, No Cause for Alarm) (Ally) (4+6+6 Fame)
Expert Hireling (+8, Athletics, Animal Lore) (Ally) (4+6 Fame)
Translator (Orcish, Jotun) (Ally) (4 Fame)
Magical Mentor (Mentor) (2 Fame)
Heroic Recall (Heroic) (4 Fame)
Class Feats and Abilities
Feature 1st: Wizard Spellcasting
Feature 1st: Arcane Thesis (Spell Substitution)
Feature 1st: Arcane School (School of Unified Magical Theory)
Feature 1st: Arcane Bond
1st (School): Familiar
2nd: Alchemist Dedication; Quick Alchemy
4th: Advanced Alchemy
6th: Basic Concoction: Quick Bomber
Familiar: Huli, the fox, Land Speed 25'
Master Abilities: Cantrip Connection, Extra Vial
Bonus Feats
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EQUIPMENT
Combat Gear: dagger, lesser antidote, lesser antiplague, minor elixirs of life (2); +1 striking staff of phantasm
Magic Items: esoteric wayfinder, hat of the magi, scroll of air bubble, scroll of air bubble, scroll of alarm, scroll of darkvision, scroll of darkvision, scroll of dispel magic, scroll of grease, scroll of invisibility, scroll of invisibility sphere, scroll of phantasmal minion, scroll of resist energy, scroll of translate (3rd level), wand of mystic armor
Other Gear: explorer’s clothing (snapleaf), alchemist’s lab, alchemist's tools, backpack, bamboo scroll (spellbook), basic crafter's book, bedroll, belt pouch, belt pouch, chalks (10), flint and steel, formula book, rations (1 week) (2), repair kit, rope (foot) (50), soap, torches (5), thieves' toolkit, waterskin, writing set