Heroes 5.5 WarGame Edition - Tactical Edition.

Unfortunately, my skill level in Heroes of Might and Magic V isn't what it used to be, so I can't mentally calculate and estimate all the options "on the fly" anymore (a very long break has taken its toll). It would be clearer to try out the archetypes with spellcasters and armies in real battles.

P.S. Is teleportation not applicable to all targets, so as not to disrupt the concept of gradually bringing armies closer together (and building defensive "boxes")?
Is vampirism only effective on your own units? Why not on any target?