Your EV spread for Uxie is inefficient. Whilst your current one yields a spread of 354 HP, 359 Def and 204 SpA, a spread of 252 HP / 184 Def / 72 SpA with a Relaxed nature gives you 354 HP, 376 Def and 204 SpA. That's a 15 point difference in Defense for free! You could also run 252 HP / 124 Def / 132 SpA with Relaxed to put those extra 15 points into Special Attack instead.
Tip: Always try and use a boosting nature on the largest stat in a complex EV spread.