[Maerlande]

I have been using Fire Arrows very heavily in a CBM game with Patala. The combination of CBM and Worthy heroes makes Fire Arrows a great choice for monkeys if you get a bit of luck with heroes. And it fits with other research for monkeys so in no way is it out of the normal research paths.

Also, I find that with Patala at least, empowering in fire is a given so that you can forge all the lovely cross path F/W/E/S items with Nagarishi's. So it's a great spell in CBM.