Too late for Lucky Chant now, I already evolved it.
And yeah, now that I'm actually using it, Moonlight doesn't seem as good any more there is way too much rain and weather effects in general. But I still can't get any hyper potions yet, so Moonlight will soon regenerate just as much as an ultra potion even when it's nerfed by weather.
Edit: I beat Episode 15 now and Clefable was worth it, he absolutely wrecked Ciel :3 Never replaced Moonlight, but didn't really use it either, Moonblast alone was sufficient for 90% of all fights.