Dawi love FIRE!!
Make the Irondrake (flame) and Flame Cannon (all 3 runes) deal NO damage to your army and ally.
In order to do that I remove all direct damage and add those damage to explosion damage then set it to not affect ally unit. So now you are free to roast as many as those orcs by fire without fear of leave a dent to your Gromgil-hard Ironbreakers.
Also change the projectiles of Irondrake from stream of fire to fire ball, so now they can blob those balls over your frontline, LOS no more.
I only change the missile_weapons_tables, hope it will reduce the conflict as much as possible to other mods.
–NOTED: although the total damage is the same and no stat changed, because it now only explosive, which function different from direct damage, you will see that sometime your Irondrake is not effective as before, especially again large entities and flying unit, it is because how explosive work. But NOT damage other unit is a bonus, and you use those to kill infantry anyway, so no loss there.
— Vanilla projectiles for Irondrake is here: https://steamcommunity.com/sharedfiles/filedetails/?id=2554709426