Question about teleportation spells

[NTJedi]

Don't use the Stygian Paths (death spell) for teleporting... it's busted and will cause almost everyone if not everyone to die.

I tried moving 300 troops of various types with this spell... 2 troops survived and the commander had 3 battle afflictions. Also it told me 9 million of my men died letting me know the spell is busted.