For the first few levels, she works wonders as a Slumber/Protective Luck/Evil Eye spammer, especially with Cackle that allows her to use Evil Eye in the first round and keep it up with just a move action. Protective Luck isn't synergic with Cackle, but imposing disadvantage on attacks is just too strong because it's almost as valuable as +4 AC and greatly protects you from critical hits (bringing the chance of a natural 20 from 1/20 to 1/400).
Regarding spells, I focused her on Conjuration (Selective Spells, Spell Focus, and Greater Spell Focus) to use Snowball, Glitterdust, Web, Stinking Cloud, and later Cloudkill and Rift of Ruin, but, honestly, it doesn't sound like a great idea. She has access to very strong buffs (Enlarge/Reduce Person, Heroism, Death Ward, Greater Heroism, Communal True Seeing, Frightful Aspect, Heroic Invocation and Legendary Proportions), but her spells list is a bit weird with a mix of spells I don't usually use. She has one good blast at most spell levels, so that's also a possible route. I'm especially excited to try Wracking Ray, which deals a bit of Strength and Dexterity damage even on a successful save.
). Of if you want to keep the dialogue (as it were, a skeleton at the feast) you could have a pic that goes the other way - have her be a real suitcase-handle-lipped Aunt Jemima looking motherfucker, or like one of those problematic frizzy-haired gender studies mulattos.
