Great Caller main pros:
- +2 summons
 - heals friendly targets for 30
 - +4 Cunning +5 Willpower
 - +0.1 wild gift mastery on all the main stuff
 - +9 Mindpower
 
- summon 3 Mindslayers (not using summon slots)
 - +3 Cunning + 6 Willpower
 - + 30% Confusion immunity
 - + 20 Mindpower
 - + 9% mental Crit