Front page posts multi-site

hi, we have a custom designed theme, with hundreds of domains, using multi-site. can you please tell us our options for controlling which posts appear 1. at the top (e.g. the first post, or first few posts), or controlling the first page entirely, but for all sites, each of which will have a different first post. 200 domains = 200 different first posts, or first groups of posts. wasn't sure which are the right plugins or if there are limitations. thanks!