Can you spam Palaces on a place you already own?
I had I player yesterday that spammed his tile with palaces and eventually got second place. He, of course, had other tiles as well and meeples and stuff but still got hell of a lot of points by placing like 5 palaces on his place.
It takes a lot of time (10 moves given that no one else places anything on an empty tile with palace), but still, can you do that?
My personal record is 8 palaces on 1 tile.
See above link for nice Djinn combos