Disgaea 3: Absence of Detention

Clear all geo panels with a chain of 5+. Best option seems to be the Chapter 3 mission, Board Conspiracy, but once you move past this you’re unable to go back until you start a new cycle. All panels must be cleared, and the chain has to get to at least 5. Item World has maps with tons of geo panels. With some clever rearranging, you should be able to get this one without too much trouble.