I don't know how much you can balance against 9th level spells
Even in actual dnd 5e, it gets really hard to balance encounters for characters with the most power spells
So many encounters will be cake walks with a two Wizard party that casts Animate Objects and Wall of Force and that's doable at level 9
Making a force dome and using Animate Objects to attack on the other side? Cheesy in a good Wizardly way lol. Larian has some AI tweaking to do with that one.
If you can fit a Cleric inside the dome they can also attack with Spiritual Weapon.
