I posted my suggestion here (btw, this is the post I started to try and bring attention to the current state of Fire Mage) How do we get a blue post’s attention? - #3 by Ravenborn-73307 but I’ll post it here for thoughts :
What if we brought back Living Bomb as a proc-based button that detonates all active Ignites for a total of x% of their current DoT value? Similar to how Arcane Missiles works, it would be inactive until triggered, in this case, by a Clearcasting proc, which Ignite would have an x% chance per tick to grant.