I didn't think I'd be in the position of needing one, although if youtube content is any indication, apparently having at least one co writer on a comic is actually really common.
Not entirely sure how I feel about that. And some projects can even have upwards of 4 writers, excluding those who actually tone the comic.
I don't think I will need a co writer, but I'll see where I'm at come chapter 5-6.
( In one comic I found that looks really really interesting, apparently the editor also acts as a co-writer to some degree. This seems weird to me, but apparently it happens. )