Fahrenheit shouldn't give extra healing, it's an ability the weapon has, not it's own attack.
What happens to Morning Glory ?
fiery is quite a weird ability.
It does not update the attack-stat (so not very easy to paradox),
but on the other hand, it does limit the turns of adrenaline.
The
weapons are the only other creatures that can show less attack than they deal damage.
however, adrenaline ignores this bonus damage.
The inconsistency makes it unclear what should happen, looking only at what is already in the game.
For balancing purposes, it should just stick with 4 | 5 damage.