What is the Hardest Gamemode in Geometry Dash?

I started working on this video like two months ago, but never actually had the motivation to finish it until now. I think this is one of my best videos yet, and I'm really proud of it. I know that different people find different gamemodes to be harder than others, but I tried to put them in the most objective list I could possibly, putting it in the perspectives of everyone. But I thought it would be interesting to put all the gamemodes in some order from easiest to hardest, since no one has really done something like that before. You may disagree all you want with this list, because I'm not saying it's fact, but it's something to consider to put the gamemodes is some type of order difficulty wise.
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My Extreme Demon Spreadsheet:
https://docs.google.com/spreadsheets/...
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This video was made by clncrvl