There is no reason to use the first one. I’m not sure about the second one because I don’t know for what reason you use it.

To block an IP, you can add a rule to the .htaccess file in the root folder of your website. Some explanations for the last version of the Apache web server: http://sharadchhetri.com/2016/07/24/access-control-by-host-and-ip-address-in-apache-2-4/ For previous one: https://docstore.mik.ua/orelly/linux/apache/ch05_06.htm

Yes, I will take a look, but I’m not sure when I can do that. And again: if you use some features in WPBruiser that Cerber doesn’t have, keep using it. That’s easy 🙂