A set I like to run as a hard hitting pivot:
Rotom-W @ Assault Vest
Modest 252 Hp/252 SpAtk/6 SpDef
-Volt Swtich
-Hydro Pump
-Thunderbolt
-Hidden Power Ice
A different take on Rotom-W who can check/counter many special threats such as Greninja, Landorus, Keldeo, Tornadus-T (watch out for Knock Off), Thundurus, Mega Alakazam, Zapdos, Starmie (may see a nice raise in usage if Aegi leaves) etc. Max Hp and an Assault Vest give Rotom decent longevity despite not having any health recovery. The Modest nature and max special attack allow Rotom-W to hit back hard, with Hydro Pump AND Thunderbolt as your main STAB instead of just Volt Switch. Hidden Power Ice for Landorus, Gliscor (I get scared of missing hydro pump too), Dragons and Thundurus. Excellent member for volt-turn teams, or just as the "glue" or final member of your team.
Rotom-W @ Assault Vest
Modest 252 Hp/252 SpAtk/6 SpDef
-Volt Swtich
-Hydro Pump
-Thunderbolt
-Hidden Power Ice
A different take on Rotom-W who can check/counter many special threats such as Greninja, Landorus, Keldeo, Tornadus-T (watch out for Knock Off), Thundurus, Mega Alakazam, Zapdos, Starmie (may see a nice raise in usage if Aegi leaves) etc. Max Hp and an Assault Vest give Rotom decent longevity despite not having any health recovery. The Modest nature and max special attack allow Rotom-W to hit back hard, with Hydro Pump AND Thunderbolt as your main STAB instead of just Volt Switch. Hidden Power Ice for Landorus, Gliscor (I get scared of missing hydro pump too), Dragons and Thundurus. Excellent member for volt-turn teams, or just as the "glue" or final member of your team.