Originally Posted by
Titus Marcellus Scato
To be historical, my house rule is that I only use flaming arrows when I'm defending. When you're defending a fixed position, and the archers just wait for the enemy to come into range, the fires (braziers, hot coals, or trench filled with burning oil) that they need to light their arrows are right there, just where they want them. But the archers couldn't realistically run around carrying those fires around with them. So if the archers move position, I imagine they move away from their fires and therefore they can't fire flaming arrows anymore.
Simply put, I roleplay that archers can only fire flaming arrows as long as they don't move after the battle starts.