Yes, I was thinking about constants as they related to Fodlan. Perhaps the amount of convergences might have some relation with how difficult it is to Summon from a particular world? As in warp magic, something 'closer' is easier than something 'farther'.

The rift was created, but not by the professor. By another group. Who may have done the same thing in the past. So Fodlan's spacetime may be full of holes?

Private:
I think this effort is important.