Business Rule Limitation

I am trying to setup an automated escalation form for another team. The idea is when the ticket is edited to a level to trigger the business rule, an email is generated automatically but the execute rules are very limited as you can only pick create, created and edit or just edit. What I would like is the ability to set it to execute once a ticket is edited once and not try again for the same ticket, as what is happening is, a single edit is sending the same escalation template which is not exactly what I want to do.

Another idea would be to allow set an option to trigger the business rule only one time based on whether the condition is met. In other words say someone makes a ticket but after further research needs to be escalated so changing the level to what triggers the business rule will only run once instead of every time its triggered for that particular ticket only.