You people are really mental.
Kill the leapers and the 2 scientists. Then pull either Stinky to the left corner in his hallway or Precious to the right corner in her hallway. There's no need to kite the other or fight
them both at the same time. This involves some tricky tactics like everyone moving to the corner at the same time or even the super secret tactic of hugging the left or right side as you
move into the respective corners so you don't aggro the one you're not currently trying to kill.