I agree with this suggestion.
A consumable to use before dipping would be a great improvement of the mechanic.
It would limit it's use so it's not anymore a free bonus damage for everyone.
It would become a tactical choice.
It would not anymore reduce the appeal of flaming weapons (atm they're only cool because you don't have to dip them...)
The mechanic would look more way more immersive in the game's setting.
On top of that, it could remain balanced in comparison to poison. If I'm not wrong poison only deals poison damage while a dipped weapon have a chance to ignite the target.
I'd also add that :
- wooden weapons should not be dippable
- the visual effect for bows/crossbow should change so only the arrows/bolt are in flame.
- the visual effect of all weapons should change so our characters hands are not totally in fire anymore.
I'm just not sure about the cost. Do you use the consummable for a bonus action then dip for another one ? Or is this an action with a single button for both ?
Imagine coating your weapon as a bonus action then cast a firebolt on it with Gale to ignite it at range.
It would be cool.