I have been working on the Unique Collection Achievement on and off for quite sometime. The way I have been doing it is I focus on one monster and pursue it until it's toast. I have been focusing on Zheloob on and off for a long time and last night I decided to put on a black hat and tackle this Elwood style.
After almost 16 hours - RIP! This has been by far the longest run for me in the game.
Now only 17 more to go and I get my 10 points.....
Gart The Mad is next, maybe I'm hunting myself.