We all know that firebolt grenades are what is causing a lot of problems in PvP right now.
The perk that is causing this problem is Viking funeral. Enemies burn longer and take more damage with this perk.
Why not make Viking funeral only activate during the super? If touch of flame is on, enemies will still burn a bit without the super. But once the super is activated, that's when sunsingers can do the most damage. I think it's a good compromise.