Which Scottish Premiership club had the best January transfer window?

Well, that was a little busier than normal! Deadline Day™ in Scotland is usually a rather dull affair, as we look jealously across the border at the stupid amount of money being spent in English football. But this time around it was pretty fun! Celtic sold some player, Rangers bought a few, some Hibs players tried to get Hibs to sell them and then Aberdeen bought half the strikers in the division...