Endless headshots with sniper rifles, machine guns, golden guns, and the occasional throwing knife for five minutes from three Guardians did not bring this fucker down. Instead of doing something productive, however, I just progressed into Venus. All the Vex swarms in the universe are more exciting than that thing.

Word on the street is that folks doing the nightfall strike are spending 50+ minutes on the devil walker alone.

Step 1: Turn off your console.
Step 2: Go do something productive with your life.

Because sometimes the only way to win is to not play.

3. Kill the enemy mobs, and eventually they stop spawning all together. At this point, it's just Phogoth.
4. Everybody should have a good auto rifle. I played a few strikes with a group and we all had nice guns, and many of the bosses went down in only a few minutes on the level 26 vanguard playlist. Phogoth took about 10. Don't underestimate how effective everybody all shooting at once is.

After getting back to checkpoint 4 or 5 times with other lvl12 randoms, I took the bullet and became their mobile spawn point. Bungie did make my life non-trivial, though. A Shrieker continuously spawn back in the entrance cave, not to mention constant harassment from Wizards. Took us well over half an hour.

Just level up and get better gear.

It only took just under 3 minutes.

http://destiny.isnotcanon.net/movies/Phogoth_Small.mov