Which cursed tool would be the strongest

Which of the cursed tools would the strongest (NOT including executioners sword)

Already existing tools: ISOH (let’s say with the infinite chain), playful cloud (sharpened or not), SSK (and say the user can see souls and use the sword perfectly), mahoraga sword of extermination (and pretend this specific RCE never runs out), black whip

Hypothetical tools: glasses that give the wearer the six eyes, antler crown that gives the wearer round deer level RCT but only for healing, simple domain creating tools (the veil-creating ones but they instead create a simple domain on Kusakabes level)