There's 2 badass psychos that spawn in the tunnel on the way to the firehawk in Frostburn, that's my best guess to start farming. Can anybody think of a better spot to farm?
I'm not home, so I'll try to describe this the best I can for anybody who doesn't know what I'm talking about. Somebody correct me if I'm wrong. Enter frostburn, go to the right. Straight / right ish into the tunnel, up the stairs, at the top there's a kinda narrow hallway where 2 badass psychos will drop down. Then later on (can't really remember directions from here) there's at least 1 more badass pyscho (I think 2) that spawn in the tunnel where the fire spitting traps are. Pretty sure if you run through, there's 4 spawns in total and should take ~2 minutes to run through on easy.