[FiresTFS]

I'd just say buff the Firefall's Cinder damage. From 5 to 10~20 maybe? (And maybe Nerhaven's Cinder damage too.)

Also give Seeker Flame as a skill and not a chance to spawn. Because that's how Firefoxes spawn them. To balance things out? Make the skill have a success rate equal to UL%. (Or you can just follow Detective100's idea, it's about the same as mine, just no Momentum involved.)