<<Cybertech. Think it's mainly Cybertechs who know and like sludge and maybe shock or pyro, everyone else goes for the V1 Ford Seismic.
I like sludge but I like the purple seismic grenade the most. Stuns all targets within a 5m radius of site. blue and grenade seismic only stun 3-4.
Best moment: dropping a seismic grenade in the middle of a group as the door pops in a VS, and as my team ran off I sat there in the middle of them to flashbang them just as the grenade stopped. 12 secs of aoe cc for 2 cooldowns. 7 people cc'ed. So much fun.