Storm Burst

When the totem casts the spell and the enemy dies it continues to fire for the duration of the totem's duration. Is this how this is supposed to work? It's not good for mapping when you don't know when enemies have died or ground effects where an enemy has died. I can recast the totems but who wants to cast 8 totems every time I kill an enemy?

I just failed a sanctum because they never stop shooting and I was unable to sustain my resolve because of visual clutter and especially volatile anomaly. Sure, I could avoid that but the other visual clutter is just awful.

Is this intended?