I like the Goliath. I throw on Rapid Fire w/Grip and Extended Mags and it's beastly. I still like the Breakneck because the first five bullets pack more damage so I try to make sure to get that and then reload to do it again.
I do notice in KC that I get a lot less tags with an AR because I can actually shoot at distance. If I use the Insanity, I get like 28 kills and 20 tags. With Goliath I'll get 25ish kills and 30ish tags.
I try to get my ppm up but it's slow going mostly. Currently at 320. I bounce around all kinds of different games though. Only thing I really don't like is S+D. I play Mosh Pit a lot because the variety is fun.
Almost done with the first GM prestige
. Just hit level 49.