Glintrok N' Roll

We've also done this achievement by "cheating" the timer. Cast Soulstone on the tank and run all the way to the boss. Have him die with the group at the bottom of the stairs. Soulstone pop and mass rez, easy achievement.

We did this by killing the scout, our druid used roar and then we popped a lesser invisibility potion to avoid some mobs.
Got us to the boss room, killed the pack as you enter the room and jumped on top of the railing.
Then jumped down, killed boss with 2 minutes to spare on the timer.

Solo'd as a 531 Blood DK (UH DPS gear with 543 weapon) and [item=86583].

- Run past everything (used a Swiftness Pot + Death's Advance)
- Jumped down.
- Used Banner.
- Waited for boss to respawn .
- Popped everything and killed the boss.

Rather simple, just a few extra tips:
- As a Blood DK, don't attack anything while running, Bloodworms (or DPS 2pc) might proc and keep you in combat after using the banner.
- Takes about 15-20 seconds for the boss to respawn after using banner, so don't pop Army too soon.
- Had about a minute left on the timer, so probably doable in lesser gear.
- All of his adds have to die, so make sure you kill them first (Shielder>Shanker>Other two) and he'll be taking extra damage.

I hate doing heroics so never did them while gearing up, now that I overgear everything I enjoy soloing these achievements for fun (and the mount of course).