Has many uses actually..
Faction mod's being the biggest for your group members. Werewolf if you don't have Enc Epic for nice low level haste buff. Fire elemental for boost in DS.
We all know how invis pops at the wrong time, I did Iksar illusion on 2 groups before to help kill Drozlin in Cab.. No need to invis to camp. Potions end up being a pain and costing more then what this cost in AA points, can use forever.