Those spells, huh. Those sure are some spells.
Aura Sight is on the list, but not Invisibility Purge; Glimpse of Beyond, but not Spell Immunity. If they'd had all the spells he knew about, but no new especially interesting ones, that would indicate that they were being first-order silly about telling Ione what to include or exclude. If they'd omitted Aura Sight too, that might mean somebody didn't update Ione about the new list of what not to tell Keltham. This pattern indicates... either nothing much, or that they're able to do basic damn reflection about what Keltham is likely to think of things, and avoided there being any blatant pattern in the spell list so it would mean 'nothing much'.
Anyways. He needs to pick his spell-request-pattern for tomorrow morning, and then sleep. There were probably other things he told himself to review today, but he is feeling a bit worn and not necessarily up for trying to remember what they all were. Hopefully they'll keep.
Today he got four cantrips, six first-circle, four second-circle, three third-circle, two fourth-circle spells. Keltham should not assume his god can do that every time, so leave some headway at each level.
He wants Guidance and Detect Magic among cantrips. If he had to pick spells on his own, he'd want at least one truth spell and at least one Comprehend Languages. Owl's Wisdom seems important to have in reserve for real emergencies, however dangerous it may be to dath ilani who didn't want to be Keepers, and you could say the same about Invisibility Purge. By default he's got the truth spell and Sanctuary to keep overnight, possibly cutting down expenses to his god some little bit.
Are there any spells here that form useful mnemonic patterns with his questions and answers? Though he should maybe also try to pick spells that his god wouldn't try to urgently assign him for other reasons. And he needs to pick spells where he can see what they do, upon a cast, and without those spells harming the target.