not that I suggest wasting time on this.... but....
you can churn through the bosses by grinding gear - if get the item drop & rarity rate up, fill up on items with good boosts (learn which boosts are good and which are crap, some start bad and get good later, or vice versa),
manually set a higher level to grind higher and higher, if the drop rate is tuned you can double your target level in a very short time, and just keep doing it