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.

The cone firing imp and lil drake are the best for PVP. I never got into the Z7 Imp as his shots for being a single shot weapon deals too little damage for my tastes.

I probably have the most fun with the Lil' Drake Imp. Mostly because I feel like a god when I actually call in that beefy 400 hp Drake mech.

Just toss up that shield, charge to get up close and personal, (and possibly kill any low hp plants) and melt the unlucky clumped up plants that usually are nearby. Ejector seat when it gets too low, toss grav bomb on any survivors, impkata or run out, rinse and repeat.

They're all good for the most part,drake imp mech is actually pretty good as it really tanky with wind shield.

Z7 for Mass Effect! Thats my reason

If you have fast reflexes, z7.

If you want more accurate shots with some splash damage, pylon.

If you want more possible revenge vanquish bonus, lil drake.

z7 deals lots of damage actually. 16 headshot damage. If you hit fast enough he's the most damaging Imp in my opinion. His primary weapon is like Law Pea, the faster you hit the attack button the faster you deal damage.

It all comes down to your preference, but I think the Pylon is the best, with the default Imp at a close second once you get his upgrades, like damage and reload.
As for Z-mechs? Pylon or Z-7.