Which Imp for pvp?

Have you tried the Pylon Imp yet?

• High direct hit damage (around 30s every burst)
• A giant magazine size (32) for a weapon that does great damage
• Splash damage is nice to have when you have a group inside your gravity grenade
• The Pylon Mech is the fastest out of all mechs and his primary is decent at disrupting enemy movement and aiming due to the animation effects
• Most players still are not used to what a Pylon Mine looks like and will often run into one (Still have to place them strategically though to be effective)
• (Opinion) ~ His reload animation is probably the coolest I have seen out of any zombie reload animation

You honestly do not need Impkata in most situations as your magazine size should last you a whole battle, unless you need the damage reduction from Impkata.