In 1st edition AD&D, my DM uses a system where on crit you do max damage and roll an additional die, i.e., if you crit with long sword you do 8 points of damage plus another d8 and whatever bonus you get; if you crit with a two handed sword against something large you do 18 points of damage plus another 3d6.
How do I calculate DPR for multiple attacks per round, factoring in potential crits, with this house rule? For example, when I have 3 attacks every 2 rounds and want criticals factored in, or if I want to compare dual-wielding short swords vs. a bastard sword with crits.