Where to farm for DLC Jakobs Legendaries?

I know the Luck Cannon and the Flayer drop from relatively common enemies in the DLC. But I don’t know where the best concentrations of those enemies are. I only completed the DLC once before with Athena on normal. So where are the best places to farm for these guns?

Luck cannon drops off those flying enemies, identity theft and addware. And four of them always spawn right in the main area of the dlc where the grinder and big claptrap is at. 2 always spawn by the trash compactor and the other 2 have a few different spawn points. But that is a reliable farming method for the luck cannon. Farmed them for it a few times now.