We want to use Opsgenie, to page different team members whenever we have a P1-Critical Incident. To achieve this we need to activate 'Alerts' under the feature and 'responder alerts' under Incident management options.
Once done, Opsgenie automatically adds 'Assignee' as a 'Responder', and it pages each member when a ticket is assigned! The whole purpose of a paging tool is to automatically page/collaborate when there are outages but not on P3-P4 Incidents or Service requests!