There are reasons you might want to do a fey-pact human warlock - the extra trained skill is a nice boost for a party face, the bonus feat is always nice (especially if you want to try shenanigans like the Stealth Warlock), human defenses are an all-round good boost and humans have great racial feats.
That said, a fey-pact human warlock isn't getting much out of his extra at-will. All else being equal, I'd go for Dire Radiance; you'd rarely want to use either of them, but you'll probably get more mileage out of discouraging enemies from moving towards you than from a little extra damage. Still not great, but better than the alternative option.