Soloing Svalfang seems to be quite the rage and I encountered two others trying to tackle the giant alone. While on the prequest Ceoldir saw a level 29 minstrel struggling with Svalfang. The minstrel was almost overcome but Ceoldir chipped in and gave a hand. Later when returning to do the quest proper Ceoldir saw a level 29 guardian going toe to toe with the giant. The guardian was putting up a better fight than the minstrel and it was neck and neck. I stood back and watched but it looked like the Guardians morale was about to hit zero first so I threw in one emergency heal. Giving unasked for heals is always risky but the guardian seemed to be happy rather than upset so I think I judged it right.
Anyway finally it was my turn. I attacked him from range with assistance from the raven pet. I kept the giant de-buffed to reduce the effectiveness of his attacks and whenever I needed to recover I used blinding flash (30 second mezz on 15 second cooldown) to freeze him and give me some breathing space. The fight itself was straightforward but a bit long: The only slightly tricky thing was watching the damage over time (dots) to make sure I didn't waste a mezz.
Ceoldir 1 - Svalfang 0.
Truthfully my level 28 LM didn't haven't to break a sweat to take down a level 30 elite. Proof again if more proof be needed that the LM is a master of soloing.
For variety I tried again later with the bear pet. The bear is hardier than the crow and is intended to be a tank but I soon found that my bear (even fed with an oats and honey buff) could not keep aggro on Svalfang and the fight quickly reverted back to me tanking and using blinding flash to mezz.