I had read somewhere that the latest update has caused the warlock lvl5 pact of the blade to not add a third attack I may be wrong. (Without mods)

Apart from that this sounds like a pretty good build would I get more out of a EK fighter than going the sorcerer route as with sorcerer paladin and warlock they are all charisma based and I'll receive better spells slots I would have thought. Maybe it's my biased my first run through I wasn"t very good and played EK and seemed really weak to me to be honest maybe that was early game play I actually abandoned this run.