Where can I grind the "kill lots of things" challenges?
I have a bunch of unfinished challenges like "Black Betty" which require me to kill large numbers of things with specific guns/grenades/shield effects. Just going back to low-leveled places makes this "easy" but I'm wondering where the best place(s) to do this are, since all areas have a limited number of enemies after all.
Where should I go to farm lots of easy kills for challenges? Assume I'm level 50 and can go back to playthrough 1 to kill enemies of any level with little effort.
Locations differ, but I can not think of any that is undoubtedly better. I'd suggest just picking a location and finding a fastest route through it.
- grinding non-bullet challenges synergize badly with shooty bandits, especially those damned rats.
- vehicle maps are bad for anything non-vehicle.
I'd personally pick Caustic Caverns or Tundra Express. Both have many Varkids (I am grinding shotgun-in-the-face on them :-), plus Tundra also has many easily-headshottable bandits.