You are a genius!!!
Guest artists!!! Of course!!! For comics!!! DC does it all the time, doesn't it? They just let another artist draw a panel for one of their series to show the style of that other artist. I remember when I was reading "Injustice" (the only DC comics I could come near to without dry heaving), every few panels the art would change and there would be mentions of other works produced by the artist who made those new panels.
That is SUPER efficient for me. I hope other artists see this! This would be such a cool way to get more advertisement. But at the same time, I assume for comic artists, it would be very difficult to include a panel of another artist into their stories.
What Chinese webcomic artists do is that another artist will make a tiny short story of a few panels about the work of the artist that is hosting them for an episode. And then that tiny short story will be put at the end of the episode.
Shows that you worked in commercial media. You know your stuff.