Party up in Nightfall

I'm a trophy whore and I need a group of people who can help me get all the trophies for Nightfall Extinction. I'm missing
"Pea Shooter" (there's always a jerk that shoots him once with another gun),
"Throttled Survival",
"Nightfall Completionist",
"Speed Slayer"

I have escaped twice and already know the preferred basic set up (Sentry Guns, Riot Shield, Explosive Rounds, ect..)

I would just like to play with maybe a possible party of 3 people, Me being allowed to be your 4th.
My PSN(Ps3) is icebomb2