I used Brazen Bones because it has a very potent En-Blizzard and Ice Spikes on it.

Generally speaking, it is something you wouldn't zerg down, so you have to kill it with another method.

And as far as I know, I'm still the only person in this game who soloed it at 75. People have tried, but I was the only one who succeeded.

I know it wasn't an important NM, and it doesn't drop anything worthwhile, but it was a challenge. Probably still so at this level too.