Hey, my team just hit 80 tonight so I thought I'd run and do the heroic daily.
It happens to be Gun'Drak.
I was like, "sweet."

I couldn't even down the first boss!

Granted, I don't have the greatest gear.
Am I doing something wrong here?
Should I gear up before attempting heroics, and if so, how do I gear up without doing heroics?

Armory Links:
Tank
Healer
DPS
DPS
DPS

P.S. DPS was doing about 1500, and tank was doing 2k.

Any help will be appreciated.