I was planning to play one of those myself, an ex misc of a recently converted cabal by pralixians:
Virtues:
Dhampir (major supernatural - "free")
Leadworker (minor hermetic - "free")
Affinity/Puissant Mentem
Affinity/Puissant Vim (can be of more use for non-magical ghosts)
Major Focus (necromancy)
Other virtues are taste/campaign or player preferences (in my case true love to my wife's char). This allows to refit the char to other houses, like merinita, with little work. Have you noticed how close is Irencilla to Transylvanian border?
Flaws:
Dark Secret (Dhampir - yes, the Tremere and the Church)
Restriction (consecrated ground - no spell in churchs and cemeterys consecrated to the One - christian, jewish or islamic)
Greater Malediction (crosses causes light wounds on touch, much like redcaps!)
Other Personality virtues, all flavorful to a guy like that.
Further development:
That is one guy from a small cabal of faerie blooded necromancers, they are former worshipers of Marzanna (en.wikipedia.org/wiki/Marzanna) and are in the process of reshaping his secrets to create a mystery cult.
I really loved that tread...