I've been reading a book called Inkspell by Cornelia Funke, and this person loves to play with fire and can do various things like, turn invisible with fire (they do something in the book to make that happen), make fire "flowers", etc. I think that firemaking should be an entertainment skill, and maybe a weak weapon like setting somebody on fire that does 5 damage, and burns you. Or possibly a defence, where there is a wall of fire that is higher than the regular fire and if people pass through it, they get 3 points of damage, for each second in the fire. A possible way to destroy the fire will be to use a bucket of water on it. Back to the entertainment part, maybe like juggling torches, eat fire, breathe fire, surround a body in fire, make fire rise and lower, and use firelighters to make the fire different colors. Also, the people in the book could also talk to fire, with some fairy's honey that was hard to get. Maybe you could create a quest that allows you to learn how to talk to fire, what words to say (but certain ones require certain levels), and allow you to attempt to get some fire honey out of the fairys' nest. Use your imagination!