Hi, there!
I think that option one of sharing everything is the easiest one. It is already a big effort for you to have to read so many articles to also have to do a selection of winners between so many posts.
It would be best if you had a couple of moderators in the community to share the tasks. But that also implies that you are sure to choose the right people you feel comfortable working with, in terms of criteria and stuff. In the meantime, you could have a figure of guest panelists to each prompt or contest to read and help you decide on the best posts if you want to go that route.
I think too about the rewards ! Thanks you for answering about that and also for your wise advices as well as nice ideas :D
A small team is slowly building and I expect that we could be more efficient for the futures challenges !
I hope you're doing well 😘