Ice/Rock
Fire
Bug/Psychic
Ice/Steel
Poison
Fire/Poison
I struggled a lot with this. Although I very much like the idea of an Ice/Steel Pokemon, I don't feel that it adheres to the selected concept nearly as well as other options. I know that some people will disagree with this reasoning, but I do worry that Steel is just too overrepresented in the metagame as it is, so we wouldn't really be learning as much. That said, I put both of the Poison options at the bottom because I'm not a very big fan of how it has been suggested that these typing options be executed.