Notes from author
Actually just a standard Faith/Dex with a splash of Intelligence and some "Dark" themed spells, Dark souls 2 will have Hexes which dark sorcery falls under now and will be boosted by faith. I am using this build to practice being such a character before the game comes out.
This requires either mega mule to get finished on the first playthrough or a friend to drop soul of gwyndolin, Or you will have to wait till NG+ to re-enter the Darkmoon Covenant.
The level on this build is a bit high... But Darkmoon Blades invade Infinitely downward(as apposed to the infinitely upward rule for dark-wraithes.), And people usually invade around or a little above their own range so you should still find plenty of activity from SL125 and SL130 range with minimum Interaction from Extremely high levels.
Why Vow of silence and not Great magic barrier you ask? Simple! Gmb counts as a self buff so you wouldn't be able to use karmic justice until it wore off, But VoS doesn't count as a self buff which allows you to apply karmic justice anyway.
Effigy shield can be replaced with Grass crest shield instead if you want a shield with better stability(and want a stamina regen buff) instead of good well-rounded damage reduction.
This can be started with either a Wanderer a Sorcerer or a Thief character, But Wanderer is best if you want the most starting resistance... But it gives that thief character on your mega mule file pack a use(assuming you use it), and allows you to use your sorcerer or wanderer for something else.