As per title and other suggestions.

Allow a mapping template to be created and named. These templates would be 'masters'. Then when creating alarms allow a template to be selected and instanced into the alarm or copied to a version and the versioned copy referenced by one or more alarms. Obviously if a template is copied version is referenced by multiple alarms dependencies would need to be displayed or alerted if changes were made to the referenced mappings for example.

I could go on but the idea is there ...