I've done a number of different builds for a Fey Warlock/Charisma Paladin hybrid but this one is by far my favorite, and the only one I've actually played in 4th Ed DnD LFR. Her build is around kiting her close burst five divine challenge by using eyebite. This way if she hits her divine challenge target she becomes invisible to them while doing auto damage to them if they attack anybody else. While gnomes are better at being invisible to enemies, Flit has certain advantages. As a flying creature she does not have to worry about being flanked by non-flying combatants and she basically ignores terrain (a big boost for somebody who takes a -4 penalty to physical skills like balancing and climbing. She can also attack from somebody's square or the square above them making her very effective at harrying casters. And having a trained blink dog with her means teleporting out of every grab ever.
I've discovered that I made her more like Ed from Cowboy Bebop than I had initially thought. As a pixie, Sir Flit Hobnail Something Something III really does not have gender and is more like a Skipper doll sized child who plays make believe about being a knight while wearing shiny beetle carapaces and tiny lizard scales. She is thoroughly ignorant of adult matters and thinks everything is a game for her amusement. Her traveling companion is a blink dog named, "No, bad dog!" NBD was placed, by Flit, into a litter of Corgi puppies and like all changelings came to look like the creature whose place it took. Flit watched him misbehave for years before he learned to teleport and the family had a proper fit. As a Pixie, Flit can talk to NBD and regularly relays the vulgar and snarky comments her runty furball friend makes and then proceeded to ask, "What does that mean?"