I like the spot dabbing vibe! It’s like scales.
I experimented a bit with the Snow over ‘X’ Celadon for the faux oil spot technique. I found that the thicker the Snow, the bigger and more defined the effect. In the closeup you can see that it’s most effective where the snow pooled more at the bottom of the drips. The Snow doesn’t actually run as much as it looks like (though it does a little and that might be tricky with very small pieces), the ‘drips’ are part of the initial glazing.
This following one didn’t run at all, it is the bottom bowl in the second photo. I’ve personally had good luck with Obsidian, Storm and Rainforest but I bet most of the darks would work well.