Last night, the guild leader and I did a stealth run to grab the second key fragment on the way to Kara attunement (horrible picture included, below). Though Amanna says this is pretty easy to do solo in his guide, his notes of when he tried make things sound a little more complicated.
Now here’s where the real strategy comes in. I hate to admit it, but I died about 5 times trying to kill the Guardian to get the key.
Well, we died about 3 times trying to get past the mobs at the start. Amanna and other guides say to bypass the first two guards and time your run through the patrolling mobs that come afterwards on the left. We eventually, after a few aborted attempts to sneak past the stealth-detecting bog lords on the right (aborted as in, "Bog Lord hits you for 3000"), waxed the first two Coilfang Warriors at the entrance (only one death trying, though if you're smart that won't happen -- sap one, then lure the second up to the instance entrance, run and heal outside the entrance once you're done, duh), and then took out one of the wandering patrols to make timing things easier. The Steamvaults is a horribly busy instance, at least at the beginning, and some good [computer] hardware would really come in handy.
After that, grabbing the fragment was pretty easy. I made the same mistake as Amanna, going full-balance moonkin, thinking the damage would bring it down easily. I ended up having to down a Super Healing pot. To continue an already hazy evening, I forgot to bring out my trees too, for some strange reason.
I also hadn't checked his notes before the run where he suggests to bring the Guardian to the surface, and the guild leader started drowning at the end -- but didn't die even though I cast Regrowth on myself twice instead of him. Nice spaz, Jal. Bring breathing potions/cherries. But things worked out, and, aside from the Bog Lord corpse runs, we got the fragment in no time at all. Much easier than managing a PUG, and it's always fun to spend some time with guildies.