Rotom-W is the best Volt Switch partner with Scizor imo, they cover each others weaknesses almost perfectly. Starmie, Jirachi, Heatran, Terrakion, Latios, Celebi, Tyranitar, Thundurus-T are all fantastic teammates for both.
I run offensive VoltTurn myself, my team is Scizor, Rotom-W, Jirachi...