Curios that are focused on the sheer damage aspect of explosions.
Some ideas:
Ring of Concussive Force: Increases explosion knockback and damage, but disables it breaking blocks
Ring of the Precise: Makes explosions significantly smaller (think wither-like), but makes the explosion deal 10 magic damage (And increases Catalyst Lobber's pierce)
Ring of the Vivid: A belt that makes explosions 50% bigger or smaller, and makes catalyst lobber throw Vivid Nitrate
Ring of the Arsonist: A ring that makes explosions incendiary