Aww, Smokey is just TOO cute!!! I absolutely adore his photo in the adorable castle. He seems to be enjoying it tremendously.
I'm so glad that his taming is going much better for you now. Btw, you weren't the only one who had to look up what monkey nuts are, lol. I did the exact same thing when I read about them on HC, too. I think it is just a term that we don't use in the U.S.
Besides the other healthy treats suggested, you may also want to try dried mealworms (some Syrian's aren't as fond of them, but mine and a few others on HC always absolutely loved them) and broccoli for additional treats to help with taming. Seeds, millet, nuts, and whimsies are also greatly appreciated by Syrian's, too.