Rare Achievement Opportunity - Thief's Maps

[ManaEthielday]

Its not that bad. 21 clears took me 1530 maps, 190 being farmed by myself, the others provided by 7 other people. It took about 2000 gazelle maps for me and I made much more money, than I spent during that process. It took me like 3 or 4 months to get the achievement done, while only playing in the evenings (maybe 3-4 hours of farm per day)

I'm curious as someone who hates myself and has way too much desire to see myself cry. Can you do the Gazelle Maps solo? Or is it better as a group?