It is seriously less than rocket science. Could not imagine any degree that would be significantly helpful other than proficiency with common computer programs. Much of it is automated. Scheduled heavy Maintenance is a no brainier, most airlines would have a system to count hours and cycles on airframe and component changes. I suppose AD's and MEL's require a bit more human planning to be worked out with the people who plan the flights (dispatchers etc) to ensure the planned event has the capabilities to perform the tasks at hand and part availability. Bottom line is A 15 year Engineer/AMT with knowledge of what is required to complete a planned task is most valuable. From personal experience most MX planners do not have the time on type to make an operation efficient, the salary is usually not worth it and the longer you do the job the less accurate your judgment will become.