Sorry for the delayed response!
You need to set Miqo to gather by item name, and not by slot like FTAC specified.
To do this, go into the Gathering tab and select the Zelkova Log preset.
On the left, you’ll see the “Gather by Name” section… and in that section an asterisk. Double click the asterisk and type “Zelkova Log” (no quotes) and hit enter. Now do this again with the new Asterisk below Zelkova Log and type in “Ice Crystal” (no quotes again).
Now Miqo will only gather Zelkova Logs or Ice Crystals on this Grid! She will now pass by the Ephemeral and gather Ice crystals any time it’s up. Hope this helps 🙂