CER: Mirror of the Fire Demon

The second picture never stops being hilarious.

In Pyramid 3/77, an article was published that introduced Combat Effectiveness Rating, CER, a concept to begin objectively defining combat difficulty (with an aside on traps and social encounters). As a helpful reference, it gives the CER of many enemies in the Dungeon Fantasy series. For some reason, it seems to have skipped over Mirror of the Fire Demon, so I decided to attempt to rectify that below.