What I am trying to get is the following:
Charm (for entry to Mindbender for 100' Telepathy so I can qualify for Mindsight)
Hellrime Blast (for entry into Hellfire Warlock)
Walk Unseen (or some kind of permanent invis)
Fell Flight (or some kind of permanent flight)
Flee The Scene (escape route)
Voracious Dispelling (or some other form of unlimited ranged dispelling)
By level 13.