>>37515834>But Steel isn't similar to another type that exists.You could make an argument for Rock.
But my point was that you're looking at the wrong side of the equation. Take Rock/Ground types. While most are defensively stated, the combo is a really good offensive pair: being able to hit everything neutrally or super effectively.
But is ultra shitty defensively. (Multiple 4x weaknesses and like 8 weaknesses total.)
Ghost/Dark is the exact reverse. (And thankfully Spiritomb has the proper stat spread.) The offensiveness of the pair isn't exemplary, but the fact that it formerly had no weaknesses and multiple resists is what makes it good.