Invisibility

Grab a mate or another account, if you have one, and join a party. Then have someone use reflecting prism on the other player. As the other player has the reflecting prism, beam on him as he pops Shard of Archstone. The player using the prism will then become invisible then just use Ai-Li Skymirror


In other words:

• Be in a party
• Have reflecting prism used on you (or use on someone else)
• The target of Reflecting Prism needs to use Shard of Archstone
• Person casting Prism becomes invisible.
• Use Skymirror to Duplicate the effect on others.