Does the Flaming Arrows spell affect missiles other than arrows - javelins, slings, the new throwing axes (BTW, have Vanheim's troops with javelins been changed to throwing axes? It seems like they would be more appropriate, now that they exist. At least for the humans, I don't know what weapons the Vanir used.)
Given how easy it is to mass slingers, flaming slings could get very ugly (Mictlan in particular has a lot of sling/javelin troops and the fire-magic-using, sabbath-leading High Priest of the Sun). Abysia has an easy time fielding fire mages, so flaming throwing axes would be common and devastating (for BoH, anyway) - although everyone knows to (try to) bring fire resistance to a battle against Abysia.
Boulders don't really need the extra damage from flaming, but it would be cool if you could pull it off
