Spiritmaster life transfer doesn't cause any agro to the mobs upon the pet's death. The set up is four SMs, Healer, Shaman, and any fillers. You need to have tinderboxes as well because you don't run out of mana. One of your SMs focus pulls while the other three do life transfer. Shaman or healer heal the SMs. When the pet dies the SM pulling runs and the mobs don't agro the rest of the group.