Advanced threat protection on Caching Storage Accounts

It's hard to determine how much you'll benefit from securing these storage accounts as well. Disabling ATP on these 'proxy' storage accounts can reduce some level of risk that is not negligible. However, if you try to reduce costs and stay secured. You can consider disabling ATP on these storage accounts while hardening the access to them. For example, make sure the storage account firewall is enabled with super restricted configuration, make sure you dont use SAS tokens, etc.