A while ago I was asked what the best way is to play Kroz in DOSBox. Ancient DOS Games answers this question in his review of
Kroz. When you play a Kroz game in DOSBox, ADG advises you to set the cycle count to 400 and select fast PC when/if the game asks you whether you have a slow of fast PC.
In addition to those settings, I like to set the machine type to cga instead of svga_s3, because I like the key-sprite better in CGA mode than in SVGA mode. Compare
Castle of Kroz in CGA to
Castle of Kroz in SVGA.