I may have discovered a method of easy leveling. Do do this, you will need a Norfleet rocket launcher, DLC 2, and a level 50 character. In pyro Pete's bar, find and accept the quest where you kill all bad*** enemies. If you have not done so already, get the repeatable tier 3 quest. Have the people who need to level stay in the rally point. Go into the bar, only using the Norfleet launcher. The explosions will penetrate walls, clearing the bar rapidly. Buy ammo if necessary. Then turn in the quest for 9777 exp. and 20 torgue tokens. Rinse and repeat. Every 5 rounds, make sure the bar is clear of loot stealing rats and clear the bar of loot. Selling it will provide money needed for rocket ammo. This can be done without the people who need leveling actually playing.