Professionally I use
Lenormand extensively (big surprise!). I also use the
Tarot d'Eltynne, which is not so much a tarot as it is a proper re-do of the original deck done by one of La Lenormande's students. It's a corrected version of the Belline, which was a failed attempt by a French psychic to redo the original. Oy. Anyway, find the Eltynne here:
http://mandefield.free.fr/eltynne_en/index.html
Very well worth it if you're a Lenormand reader.
Leidingkarten are very good for everyday kinds of readings.
L'Oeil de Lotus is stunning and accurate - it's not really a sibilla, but it's very similar to one, and is read similarly.
All of those decks have systems, and are read by card combinations.
The
Symbolon is the most powerful deck I've found for dealing with psychological issues, but unless it's really serious, I won't use it. Be prepared to be reduced to tears, or for your client to be when they see it. It really cuts to the heart of things, and is definitely NOT suitable for psychic fairs, parties, etc. You want someone sitting across the kitchen table from you, privately, for that one.
Strangely enough, the
Victorian Flower Oracle, as well as the LS
playing card deck that features JJ Grandville's flower drawings work really really well. There's something about Grandville and me that just 'clicks'. I don't know how to explain it. But I often pull a card or three from one of those - and that does have a system, too, as it's based on Victorian Flower Language. The same holds true of the Grandville-based
Fantastic Menagerie Tarot, that one brought to us by the good folks at Magic Realist.
I also sometimes use astrology in readings. So I guess for me it's decks with a system that have proved to me that they work.
The only Angel deck I have is the
Angel Blessings by Kim Marooney. Not sugar-coated. The cards are mostly taken from paintings by the old masters and not all of them are sweetness and light. But that's one I'm more likely to use for personal than professional. Still, I might rarely pull a card for a client from it.