Being pure illusion, I basically am constantly spamming the shurikens. It only has one mass stun ability but it only lasts for like 1-2 seconds, though the Illusion tree seems to be focused on weakening enemies more than anything.
Shuriken spam though works well since it's power cost is low and it woks as an aoe at the same time so all i good.
I think people don't realize the role they are supposed to play and building their character towards it till they hit 30, as before that, it's not really that important. Never found the alerts pre lvl 30 to even really require the need of the roles all that much to complete them, but once you start doing hard modes and lvl 30 content, the roles become very important.
Anyways going back and playing my Hero now a bit and really enjoying it, the game does a good job of giving you a different experience between heros/villains, though not a fan of the music on the hero side