Please only reserve two sets if you are confident you can get them done in time. One set is perfectly fine to reserve! Keep in mind that OU's two paragraph mini format is longer than formats in other sections like National Dex/OMs, so taking multiple sets will be more work. If you're a first time writer, I would definitely recommend one.
We are also imposing a one-week deadline on all sets. If your analysis isn't QC ready a week from your reservation (and you haven't let mods know about any issues), we will reassign it. It's also important to get WIP threads posted as soon as possible - WIP threads don't need anything in them, just set set is fine, but they provide a place for forum mods to see who's actively working on what. When it comes to the deadlines, us being able to tag you on a thread is much more reasonable than having to find discords or other ways to check progress.