Well, i tried this exploit , and it works!
requitments: 24 lvl scavenger, must have 2 lvl spoil.
step 1:Go to alt + x , options game, and set party random including spoil
step 2:Get a party, it needs 3 ppl = you , friend and another friend.
step 3:Go To execution ground
step 4:2 TIMES SPOIL, and move off, let your friends kill mob, and you sweep the items, and you get 3x more items ...
step 5: I hope you enjoyed ^^