Sunfire Cape passive rework (concept)

The passive sucks and is not fun or interactive.

Make Sunfirecape have a toggle ability with a fuel/energy bar that refills slowly when not toggled on. Upon activation the fuel bar starts decreasing and emits ticking AoE damage. At full bar upon activation it emits an initial "Heavy" burst AoE damage followed by the ticking damage.

This would alleviate the annoyances with Monster aggro and give it something more interactive than just a passive armor/health item that helps wave clear.

Thoughts?