Easy soloable even if it says it is a group quest. Fly in to the Iron docks flightpoint. Make sure to stay high up on the higher levels, if you venture down to the bottom you will probebly die faster than you have time to utter a weak "yelp"!
There are ammunniton boxes and barrels scattered around the place, pick up so you have at least 30 ammunition, go to one of the cannons (not the launch ones, the suprise I felt when I was shot out into the middle of the packs instead of shooting at them was something I don't want to experience again). From the safety of the cannon see them orcs fall! Rinse and repeat.
There are elite patrols even at the higher levels sometimes, so be aware where you step. Stealth past, or wait for them to pass.
Should you have a group at hand, make sure to kill all rares, they drop more apexis crystals and gear, and contribute to the daily count. Kiting works if you don't have a tank.