A notation on the Rogue/Warlock; I'm not sure that this is legal but if you could get a sneak attack coupled with the Warlock's Eldritch Blast it could deal massive amounts of damage.
It seems within the rules to me. You would have to be within 30ft and the foe would have to be flat-footed. If you want to be able to do it by flanking, you would need hideous blow so that it can be done in melee. It would be interesting at higher levels since you need to decide between multiple sneak attacks or just one with eldrich blast.
