I kind of like leather. The rest seems good to me. Any idea how to CR these? They're basically 8th level druids minus the animal companion and a lot of hp.
For tactics: Gan-da-yah prefer to avoid combat, seeking a peaceful life among their favored plants and animals. However, when pressed, they will use their spells to summon animals to fight for them and to escape to a safe distance. Then they pepper their enemies with magic arrows and annoying spells.