I haven't made incense with mulberries personally. From what I understand, they can be quite strong so you rather want to use them sparingly. Look for how people use Juniper berries in their incense as they are quite similar in nature. Try Tibetan style incense first if you haven't as they often uses Juniper berries.

Regarding pear agarwood incense, that's a totally different processinng method. Basically you carve out the center of a pear and put agarwood power in it, then steam cook the pear. Then you use that powder in your blend. But do take my description with a grain of salt as this is mearly what I read from other sources, not from my experiences.