I'll consider it

You can do this by running raids through the server console. All you would need to do is have your server run a cron job or equivalent (sometimes called a scheduled task).

RaidsPerRegion3.0 is also much better optimized and better at running raids through console

It's unfortunate you didn't like my plugin. I'd like to address some of the points you made.

Mobs spawning outside regions - This was an intentional design decision as it makes small regions work better. I see how this could be an issue if you are making an arena of sorts. I'll add a config option for the next update.

Number of mobs not matching settings - I'm not exactly sure what you mean by this. Changing the mob spawn rate multiplier options in the config changes spawnrates. If you are having trouble with your config you can join our discord server for support.

No rewards - You can make your own rewards using the command feature in the config to add both rewards and punishments via global or per player commands.

Notes:
RaidsPerRegion is not an out-of-the-box type plugin. It needs to be configured to your server needs to maximize its potential. My updates will therefore focus on adding more generalized options and improving existing features

Try RaidsPerRegion 2.0 if your server is running 1.18.2. If you need support you can reach me on the discord server linked above.

Countdowns is something that I've wanted to implement for a while. I'll look into adding them for the next update

The raids are meant as part of a PvE challenge for your server. How you use them is up to you. In the next update I plan on adding commands you can run upon a raid win/loss. For example "/eco give * 100" would give every player on the server $100. You can do this manually, of course, but I am going to make it integrated within the plugin.

Thanks! I've fixed the discord link. Feel free to contact me there

I'll see what I can do

I do plan on updating it and adding new features! I've also made a discord, linked above. Feel free to ask me any questions you have, I'll post some examples there. I'm also not sure what you mean by more regions. If you mean running multiple raids at the same time that's something I can look into.