EASY:
  Kudzu: 50% progress = 3 fingerprint kits
  Mansquito: 50% progress = 3 ultracoagulators
  Miss Graves: 50% progress = 3 kickballs

MODERATE:
  Author: 25% progress = 1 bat-o-mite
  Plumber: 25% progress = 1 bat-oomerang
  Mad Libber: 25% progress = 1 bat-jute

HARD:
  Doc Clock: 25% progress = 1 kickball / orphans + explosives
  Burns: 25% progress = 1 ultracoagulator / chemicals + metals
  Inquisitor: 25% progress = 1 fingerprint kit / evidence + fibers