I would really appreciate the following variables for notifications/escalations and script actions anywhere the system sends e-mail regarding a ticket:

$TicketOwnerManager - Manager of the technician who owns the ticket. This is primarily for escalations but could be useful elsewhere.

$TicketGroup - E-mail whatever addresses are specified for the support group the ticket is assigned to.

$TicketGroupOwner - E-mail the owner of the group the ticket is assigned to.