I combine psychological astrology with tarot and they work perfectly together - just of course, you need to be versed in both in order to understand how they relate. Here comes also the alchemical imagery which relates strongly to astrology AND tarot, not to mention the common mythic background of both systems. But most importantly, you need to have eyes to see the deep underlying connections and the level of consciousness that is able to perceive unity and one-ness, not just in tarot, but in life in general.
I sometimes play with the Tree of life of kabbalah and this also gives a lot of depth to tarot readings, but I am not at all well learnt in this area, I barely touched it. But if I went there more deeply, it would certainly give new depths and dimensions to my tarot readings.
I was also using I ching quite a lot - and I remember getting the hexagram for 'shock, upheaval'. At the same time I was getting Tower in my tarot readings
My life experience at the time corresponded to the readings, of course.
In my view, you can combine whatever symbolic systems you feel drawn to - since they are all just different doors to one universal human experience. Differences, however drastic they may seem, are merely superficial.
Human experience is universal even if we seemingly speak different languages. As you said, IN THE CORE, the message of tarot and I ching was the same. Yes, since in the core we are ONE.
I am really happy to hear of this your experience. I find great value in combining, I am all for expansion and including, this brings humans closer, it unites them. And as with hybrids, it is good to mix and spread the genes
This brings out new qualities and promotes growth, provided of course that it is done with awareness and with good knowledge of the systems you use. On the other hand, sometimes it is ok just to play around
Many creative solutions can be born out of play and experiment.
So, my point is: I am all for play