Level 15 main enemy sorcerer build

[Cassim Doka]

Making a lvl 15 sorcerer as the main bad guy of this campaign that i'm running, Starsoul bloodline Fetchling. He is a neutral caster with an intelligent blade, sort of a fetchling Elric. Looking for help building because I've never ran a sorcerer. Looking for good feats and spells. Tryin to do a slippery type bad guy, very light on his toes and hard to get at (at lower lvls at least) Someone who can display great power without TPKing everyone as soon as they meet.

[GM Arkwright]

Slippery and light on his toes; sounds like you should be lumping for the Silent Spell metamagic feat and having him run Invisibility while he casts enemies to death or unconsciousness.

Feats: Improved Initiative, Skill Focus (Stealth), Quicken Spell, Silent Spell, Spell Perfection (Something)

Not certain what build would go best with that style, but my guess would be a summoner?

[BiosTheo]

Probably Spell Perfection on a specific spell you want him to ninja at people while under the affects of Greater Invisibility.