Earth in shambles no bueno.
But otherwise, I'm liking it. So start with the discovery of magic through technology. Next would be a golden age of expansion. Then we'd need conflict of some type, whether natural or human made, to end the golden age.
Off the top of my head, maybe because of the distances involved, magitech evolves on different paths, leading to differences in philosophy. Some would focus on augmenting humans themselves with magitech, and others would focus on changing worlds and environments. One side that has god like individuals, and one side that has the power to create nearly anything.
I like that.
I dont mind doing it more light, I am most hyped for the different philosophize/schools of magic anyway. XD And making up magic machines used in space.