Café de Nuit

A way round the killing nature of his attacks could be:

Maybe before combat Mircea drains the humors from other victims or clones.
To boost his powers -dependent on what he knows about the PC's.

Finding Mirceas larder would be quite horrifying and give some clues as to his special abilities and ...

I recently ran a northern wilderness adventure with the prince as an degenerate vampire like alchemist who had populated his domain with half golems, clones of the player characters and clones of himself and the royal family. All CE naturally.

That coupled with a frozen domain and Mirceas magical ...

Hi - I have got the original black box map open in front of me.

Mt Gries (or the foothills) seems to be at least partially in Markovia but is mostly in Dorvinia and the monastery is on Mt Baratok -shared with Barovia.

The other two mountains that fully reside in Markovia are not named on the map ...