Doppelganger (9 Ranks 3/6/9/7/9/12/7/9/12) is an instant-cast AA which shadowsteps the Enchanter (Doppelganger Recourse is the name of this aspect) while creating a simulacrum of Enchanter where the Enchanter stood. This pet is created with one additional point of aggro higher than the Enchanter who created and will attack the Enchanter's targeted mob (within 150' range). This ability cannot be used on player characters, even in PvP situations. The Doppelganger fights with melee only and cannot cast spells. For the first three ranks, the Doppelganger has 1000 hp/rank, the HP of subsequent ranks are unknown. At level four through seven, two doppelgangers are produced instead of one, not simultaneously, but in rapid succession, the second created within one tick of the first. Passive pet AAs apply to the Doppelganger, such as Extended Swarm, Sturdy Companion, Companion's Fury and Companion's Alacrity (qv). The normal reuse timer of this AA is 30 minutes, while Doppelganger's Beckon can shorten the reuse.
http://www.eqwiki.net/wiki/Enchanter