I had to pair the daemon cards with the traditional RWS cards.
Pros: It creates an interesting dialogue between shadow and light aspects. The demons often say what the tarot is too polite to mention directly. Like when Malphas paired with the Three of Pentacles revealed a workplace betrayal my querent hadn’t consciously recognized.
Cons: Energy management becomes crucial - I need selenite between decks. Reading time doubles since you’re interpreting two systems. Some combinations can be intense. Glasya-Labolas with The Tower nearly gave me a panic attack about my dog’s health (turned out to be minor).
If you try this approach, using amethyst as a filter stone between you and the Daemon deck helps moderate the intensity while keeping the messages clear.