The two salvageable files were fixed, rotated and cut so they had a proper flat surface. Now you can just print them and they'll work (assuming your printer is properly calibrated)
I also increased the scale by 200% and then stretched theY axis by 150% so it is more tower like, I actually quite like that the skulls look distorted.
Recommend 0.05 layer height but if you CBA to wait the 44+ hours use 0.2 and you'll have both parts done in just under 20 hours.
Many thanks to onebitpixel for designing the original model, its a real beaut!