Only one department can appear at a time, but departments can exist at the same time. So at most four at a time, that is, one for each department.
For example, the ground-bound totem and the trembling totem belong to the ground totem, so there can only be one between them.
If you can't tell which series the totem belongs to, look at what tools are needed in the totem introduction, and write down the totem that needs water, which is the water system.