Looking on ways to improve my damage

[Wrongful]

I’m currently doing around 600k damage to ghosts and am wondering what I can do to increase it. The cost of something isn’t a problem (assuming it’s not over 1 billion), and I don’t mind farming for a few days to earn money if I need to get better gear.

I’m aware that I need an Ender Dragon Pet and a Giant’s Sword, but besides those items, what else do I need or what should I do?

https://sky.shiiyu.moe/stats/Wrongful/Orange

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