they also clear the "jailer" debuff. possible other debuffs from champions as well, but I don't intend to get frozen to try thatQuote from Kaelleria
The only place I've found mirror images really effective is on Diablo to remove debuffs. In other areas, teleport + wormhole is usually all I need elsewhere.
I use teleport + wormhole, mirror + duplicates and illusionist. managed to clear act I inf yesterday with 20K dmg, 24K hp and ~300 ressist. only one champion pack gave me a hard time (died 3 times), everything else worked fine once I got used to the new skills.