Since all the text for the check is transferred to the server, it would be better for security reasons if the requests were distributed over several servers. This means that not just one server alone will be aware of all texts.
The addon could therefore allow a list of server:port entries in the settings, which are then rotated or randomly changed after e.g. 30 seconds.
But it looks like a task for a load balancer on backend, not for the plugin. There is no security improvement, if balancing is done on client side (every one could change plugin code on their computer or simply request servers like plugin, without this load balancing). Maybe there is a few performance improvements, but still - it is rather backend job.