Well, Michael AW is sure one part of the 'problem', but not the sole culprit.
The fact that you can have:
Tiara Set
Tish
Lugh
Iris (will come with Envy UE)
That is the real Synergy overload that's gonna happen. It is glass cannon, but the amount of BG-Generation, DATA-Rate increase and on top having Shingen boosting Burst power into oblivion lets you even forget what type of Grids you can have behind that.
On top, if you pace properly, you can avoid ODs for like 10+ turns, which makes this even more absurd.