Queen Bazzt Bzzt the 200th

Strategy

 * To spawn, clear the stationary groups of bzzt bixie soldiers. Once those drop, two groups of bzzt bixie stingers pop.  Clear those.  Queen Bazzt Bzzt the 200th spawns about 15 seconds real time after the last stinger drops.
 * Easily soloable with a merc. Tough but possible to solo.