Yeah, I also really like TomeX/PaladinY builds. Depending on what you want, there are great combinations at many stages from Tomelock7/Paladin13 (4th level spells from both classes, optimal slots for smiting RAW, always 1d8 smite) all the way to Tomelock14/Paladin6 (paladin saves and warlock lvl14 feature). Not the only great warlock, of course. (Warlock is a great multiclass, but scores low, I think, on classes to take 1..20, or even to almost-20.)If we're talking DPR, Paladin 2/Warlock 9/Paladin 11, no exceptions. It doesn't kill things, it overkills them. Unless you consider a 5th level slot giving you 5d8 to not be a mistake, in which case Fighter 1/Paladin 2/Warlock 7/Paladin 11/Fighter 2, Fighter optional.