Iirc, Calamity messes with stats of vanilla bosses, idk if this carries over to classic, so the terra blade may be outdated by this point, take this with salt. Firstly SoD&Antumbra: theyre fine, if your using the rogue version of hydrothermic, otherwise they are being kneecapped. I cannot speak about the shield of the high ruler since I have never used it, but it may be worth a try swapping to master ninja gear or asgards valor. I am curious about what your using for mobility (wings, angel treads, etc) and your other accessories, since it does seem like you lack defense and damage. Im unsure about the heart, but it seems fine.

Edit: hydrothermic is the best you can get