Cleon
Legend
You make a good case for eagle's splendor at 2nd level.
Let's go for that then.
Summon monster I, hypnotism, and enlarge person (for martial type slaves) seem appropriate at 1st level. What do you think?
By the way, I think we should drop the Wizard spells prepared section, since we went with innate Sorcerer casting. And the listing should be "Typical Sorcerer Spells Known," as opposed to "Prepared."
Why hypnotise when you can enslave?
I think they'd be better off with a defensive spell in their first level selection, like mage armor.
The problem with enlarge person is that they do most of their business around the outer planes, where there are few humanoids to enlarge. Even petitioners are Outsiders.
They can't use it on their Umber Hulk bodyguards, because those are Aberrations.
If you're wanting an offense-boosting 1st level Wizard spell it doesn't really have any options except for true strike, which is Personal so can't be used on its slaves.
Maybe ray of enfeeblement to make an opponent easier for its slaves to overpower?