As a quick example, the illusion/enchantment list for my lvl 17 high elven faerie (eldritch) knight:
Cantrips: chill touch (4d8, no healing for a round), minor illusion, prestidigitation, shocking grasp
1st: charm person, shield (+5 AC), silent image
2nd: blur, hold person, invisibility, mirror image, suggestion
3rd: hypnotic pattern, major image, phantom steed (100 ft move)
So he uses prestidigitation and minor illusion as glamour to look particularly shiny and glorious (you could swap in Friends here if you chose), and leans towards blur and mirror image as his combat defense spells. With Eldritch strike (hit a creature, and they gain disadvantage to save against your next spell), he could spend his action hitting everyone he can reach (4 attacks with 2 weapons), then spend his action surge casting Hypnotic Pattern. At the very least, this gives him enough time to pretentiously gloat.
