Here area few simple fire effects. Primarily for travelers, although many will have tricky wider applications. Firstly a cheeky way to extend the range of a Faerie Duration: Fire spell. The affected fire still needs fuel, but this effect allows for easier maintenance and longer effects.
Fire of Little Fuel
Muto Ignem 15, R: Touch, D: Fire, T: Individual, Faerie.
Changes a fire to consume almost no fuel, and to be more resistant to disruptive effects of wind and rain. A fire under this spells effect burns for three to four times longer on the same supply of materials, and can withstand strong wind and rain.
(Base 3 for an unnatural effect, +1 Touch, +3 Fire)
The second effect is intended to make a fire safer around people. I had an odd thought that it might also be a useful fast-cast defense against Ignem spells too.
Fire That Burns No Man
Muto Ignem 20, R: Touch, D: Fire, T: Individual, Faerie.
The effected fire can warm but not burn humans. All other aspects of the fire remain unaffected. The targeted fire may be as large as a house fire.
(Base 3 unnatural, +1 Touch, +3 Fire, +1 extra target size)
Then an effect designed for use in the wilderness, on ships, or anywhere a fire is could be useful, but the environment is not conductive to flames.
Fire for the Boatman, Shepherd, and Scribe
Creo Ignem / Muto 25, R: Touch, D: Sun, T: Circle.
Creates an unnatural fire which can warm but not burn people or man made products (treated or manufactured items), but will cook raw ingredients as normal. The fire’s size is determined by the circle drawn during casting, and may be as small as a candle or as large as a campfire. The fire can be extinguished prematurely by breaking the circle.
(Base 4 to create a fire hot enough to cook with, +1 for Muto effect, +1 Touch, +2 Sun, +1 complexity for multiple exclusions, +0 Circle)