Hello,
are those bots performing "valid" requests? For example looking for a page that simply doesn't exist or trying to access the same page several times?
Admin Tools can only protect you when a visitor raises a security exception, so you can safely block it.
In your case, if they "only" generate a tremendous amount of traffic, the only solution is to use a Content Delivery Network, like CloudFlare.
They have a free tier and the setup with Joomla is pretty simple, so I'd suggest you to take a look at it.
Davide Tampellini
Developer and Support Staff
🇮🇹Italian: native 🇬🇧English: good • 🕐 My time zone is Europe / Rome (UTC +1)
Please keep in mind my timezone and cultural differences when reading my replies. Thank you!