It's really odd that we don't have a sub split Rotom-A set on-site, seeing as this set is fairly common and very good. I personally have used Toxic instead of WoW before and it proved to be fairly effective (but my team was trying to take out Blissey for a special attacker to sweep late game, so that was more practical). I wouldn't mind Toxic in AC, but yeah, WoW gets the primary nod. To be honest, I don't even see the merit in mentioning Hydro Pump on this set; you have no investment in SpA, so you're not going to be doing too much damage either way, so you might as well stick to a more reliable move in Thunderbolt, and leave your final option up for status support.
Anyways, I will be approving this set for sure, but I would like to open the floor for some alternative EV spreads first. Rotom-A is the one Pokemon on-site that needs a ton of major EV revamps, because the ones on-site are random as hell, and Rotom-A can pull off some incredible stuff with the right spread. So yeah, let's hear your spreads folks!