Dimension Door is a great spell for the borg. He added a use for it when he is fleeing a level and needs to get to either stair.
He will also not attempt the move to the next town if he is heavily encumbered.
Zborg also needed to better understand and use the Trump Spying for ESP.
Zborg was miscalculating his internal stats by 3.
There was a double reward for carrying certain spell books.