I have done this quest with 5 different characters. 3 times, i have done it solo, 2 times without dying a single time.
Here's what I did:
- Stock up on tonic (just in case you need it)
- Remember to get the crate outside the fort
- Get the crate just inside the door
- Skip the barrel next to it
- Head up towards the first fort level
- Get the barrels and crates near that archway
- Skip the barrel at the end of the ramp going into the first fort
- Get the rest up in the first fort and on top the walls
- Take your time and pick your battles wisely
- Leave yourself time for your health to restore before jumping into the next battle
Of course, if you want to do it the fast way, recruit some of your high level guildies, with staffs, and let them pick the fights ahead of you. The downside to that...you don't gain the rep from doing all the work yourself.