Which of the 15 entities could best be combined into a single fear?

It's been a common thing in the fandom to talk about if certain fears really should be separate from each other. I think it's fun having 15 but I'm also wondering which work best if they were combined (even though there technically are not any individual entities and Smirk is flawed), like if post-Season 5 fears were interpreted by new people who didn't care to go up to 15.

Basically, give me your hot takes on which entities are close enough