Technically Dr.Lash isn't supposed to be killed the game even says so and resets the fight after if you manage it so i have no idea why they gave him drops in this case, but it is clearly the best endgame credit farm bar none, if you consider this oddity a legitimate way to make money it is, however incredibly hard and takes a good strategy to beat it and if you aren't maxed stats with all the best thermal resist gear you probably have no chance plus to do that you need a decent amount of cash to begin with, so you will probably want to farm low level creatures first anyway... which leads me to the little trick i used to get my first 100k... which is sexbots and grey goos! ( no, not that way... how i wish i could turn a cheap credit off them each time they do something perverted.. *sigh* ) i just made a macro on my g13 to spam the attack, move and masturbate keys at incredible speeds for a while till i had enough credits to buy whatever i needed. if you don't have anything like that, doing it manually with the keybinds is much faster than clicking, if you don't already do it that way obviously. you'd basically spam adadad till a creature appears then 1212121212 till it dies and r31 for a masturbate cycle and repeat, it's reasonably easy to get that going at a rapid pace if you ignore what's going on ingame and work up some muscle memory for it. Welp hope that helps someone. enojy jilling your keyboard senseless, you lucky keyboard you!