Ok, first off... Super training gives you Ev's it does not just boost what you want wherever you want it, thus, due to his low base special attack stat, any special moves you fire off will not do very much damage even with good investment. His "Balanced Ev's" as you called them are probably his Base stats, and they are also far from balanced anyway, Zygarde has high attack, defense, and Hp, and that's about it for his high stats. And finally, Being in a hailstorm, will NOT change Zygarde into an ice type, unless a field effect is in place such as grassy terrain or fairy terrain, Zygardes Camouflage will change him into a Normal type pokemon under normal Wi-Fi battle conditions. Instead of Focus blast and draco meteor, use extreme speed, Outrage and rockslide for huge STAB and/or coverage options. (check my set I posted, you have to first use outrage first in your case, spam it until he stops, then turn into a normal type via camouflage and extremespeed spam until zygarde faints.) While I CAN see where you where going with this set, sadly, the games mechanics just don't support this set on Zygarde.