Elemental Attack vs. Resistance

[HJ]

So, the only thing that additional fire will do is set the target on fire if it survives the physical damage? But even this is not mandatory, only a probability, is it not?

What about "small area fire" and similar weapons? Does anyone know what amount of damage small area fire does, and is it dealt on top of physical damage? I assume that only the unit that actually got hit gets the physical damage, while the rest of the units in a square get only fire damage, is that right? I've been using these quite a bit, but I can't say I have the details on how they work figured out completely.