@Vormund:
Go for a Gyarados. I prefer a bulkyDD version, but you could go with just about any kind. Gyara will lure Electric type attacks for Electivire to absorb and gain its Speed boost, which is going to greatly increase its sweeping capabilities. Just about any version of Gyarados is going to appreciate having Stealth Rock removed, so a Spinners like Starmie and Forretress are good options (Tress not so much, seeing as it's a more defensive-style Pokemon and you're using an offensive team). I believe you're using a Meditate Electivire, which is gonna have problems getting around sturdy physical walls like Forretress, Rotom-A, and Hippowdon, so a wall breaker will be appreciated. I'd say Infernape and Tyranitar will help you out, 4 Attacks MixApe can take out Tress, Hippowdon (81% - 95.7% with Grass Knot), and Ttar can trap and kill Rotom-A with Pursuit (just watch out for Will-o-wisp). You'll also need a lead, so check out
this post for common leads.
That's six, so feel free to change that around as you please. All I did was give you a nice backbone for a team.