So this mean I should ditch the Bold nature spread, and shift it to a more Specially Defensive focus?definitely keep sdef first, it's the most consistent and generally useful. i've personally been utilizing it on a stall team with good results, and i'm sure many other people can vouch for its utility and overall excellency.
Yeah I never really found Echoed Voice to be THAT useful, but I left it in as per recommendation; I'm not objected to moving it to OO. This would also mean the set won't have any slashes! :)snip snip
Also no to Dig, Sylveon shouldn't be using Physical Attacks... and Draining Kiss is too weak when Pixelate is available to buff Hyper Voice. If you reeeally want healing, then Wish is an option.