Alright, so I tried to send a tweet to dislekcia About a bug, or rather another one. But seeing as I'm very unuse to Twitter I'm not sure if he got it, so I decided I might as well register for the forums.
Since you rid the Wizard of his mana conversion bonus, in one of the puzzles, in the starterpack, "Positioning", it requires you to use Weytwut, to switch places with a zombie, and convert it for enough mana to use Pisorf to get pass the goat. But since this ability is gone, I'm not sure the puzzle is winnable anymore.