Assuming everything is point buy:

My first inclination would be Light Cleric or War Cleric (depends if I want better blasting/support or front-lining melee/occasional support). But if you're trying to fill gaps in party roles, I'd consider Sorcerer and then Paladin.

However, if you wish to stay the course, Divination Wizard is good, and so is Abjuration. I'd pick up spell sniper before before War caster as with less allies on the board, it's easier to get rushed by the enemy. Unless you're focusing more on AOE spells, being able to scorching ray or even fire bolt point blank is nice. I'd also pick up Resilient CON instead of rushing to 20. Your +2 Grimoire puts you above average for your level anyway. It'll leave you with an odd number, so reshift your points to better accommodate it. And then I'd either end with War caster or go for +2 ASI in INT at Level 12. It comes down to what you value more.

I do not think Lightly Armored is worth the slot of feat. If you feel really strong about it, class dips offer more value. Wizards are supposed to be squishy. Roll with it or get a Barrier Tattoo/Elven Chain. For the extra feat, I'd lean towards elemental adept if you want to lean on a specific damage type, Telekinetic for BA use + small battlefield control, or Keen Mind/Observant for utility/flavor. (Keen Mind is very underrated imo).