For an example of abilties that could gain potential burning with a little bit of thought.
Valour deals 100 Direct Damage and Burns for 3s.
Blast shot deals 250 Damage and Burns Targets for 2s.
Grenade Deals, 500 Damage Burns for 3s.
Grumpy Bomb Deals 600 Damage and Burns for 2s.
Fire Spit 800 Damage and Burns for 1.5s
Combustible: Targets are knocked back and Burn for 3s.
Adapting Buring into fire abilities in general.
Missiles deal 150 each and Burn for 2s,
Missiles in Hexifire also burn.