In All Hail Megatron #7 Devastator is described as a gestalt. I don't quite get why everyone's so hot for 'combiner' - since it was never used for anything other than Micromaster pairs until RiD in 2001 it has no more validity than gestalt. It's also interesting that no one seems interested in the names that were official in the 80's and 90's - 'Special Teams' and 'Fusilateral Quintrocombiners'. Unless 'Combiner' is short for that.