I think its somewhat necessary for every build in calamity to not be viable. The main challenge of it becomes more of your build, since there arent as many ways to interact with the game compared to say action game. I think one way to help would be more diversity in useful items for other strategies, but finding the right ones is a whole nother problem on its own.
Makes sense. It's a little sad to not be able to win with the same number of strategies though, or at least more different ones. In the last days I tried new strats but I can't manage to make them work. If I don't have enough defense, I die :/ Dunno. I would love to be able to make a "super aggro/speed team" or something like that. But maybe I'm just not putting myself too much in it. It is freaking "Calamity" mode! It has to be hard! XD