Math is hard.

So a gun has 2 damage types - normal and durable. An enemy has certain resistance types, normal and durable. Different ratios mean some weapons are better at hurting enemies than others? For a durable enemy, you want a high durable damage gun. For a normal enemy, you want a high normal gun. If you mix that (durable gun VS normal enemy or vice versa), it'll work, but not well.

Is that right?