Ember Immolation scaling uncapped

This is not a bug. The energy cost of Immolation has always scaled infinitely if you stay in an overheating state. The change was to reduce the starting cost, from which the scaling derives, from 10 to 4 which makes it a lot less expensive to be at max heat or slightly over.  The intention for this power remains that you will "dump" heat using Fire Blast, or that you will strategically find the right time to toggle Immolation off and reset it.