1) Reach the top of the spire in the middle of the pit
- Can be done with the Mechashredder 5000 ability, glider, launchers around the pit etc.
2) Jump up and down
3) Get credit for jumping through the ring you're touching (even if it goes invisible after you hit it once)
4) Receive Iron Wings achieve after your 4th jump and watch the daily meter fill in a mater of seconds!
Pictures of place to stand.
Solo Assault the Pit. Easy - Imgur