I think I'll have to go with 10 even though they are not a co-creator. There's just so much that they still manage to do that helps out a lot.
Though my SO doesn't contribute to the workload in obvious ways like drawing or writing, they do some editing to make sure I'm using the right words (though they're not an official editor so a lot of stuff does get missed, but it's still a lot better than nothing especially for novels)
They set up a discord server for me so that I could talk to fans of my series.
Helped me pay for a mobile drawing tablet so that I could still work on comics while visiting them in the USA to meet their family and friends, because they know I get stressed and start getting depressed when I can't work.
Help cover funds for bills and food, and gives me a small cash incentive every time I hit the middle of a chapter, and every time I finish one. So that I don't have to do commissions to pay for bills or feel like I need to do commissions if I want my art to be valid and worth something. (I absolutely HATE working on commissions, so every time I end up having to do them for financial reasons I get into really horrible depressive self loathing mindset)