Typical Earth Teams
Here are the best element combos with earth I know of, roughly ordered by preference. In most cases variants exist.
3E+2L is by far the best defense team you can build, and a good team all around. More generally earth can be used to help defend buildings thanks to its random nature.
| 5/5 |       |      | |
| 5/5 | |   | |
| 5/5 | | | variant for CoW defense |
| 4/5 | |  | |
| 4/5 | | | |
| 3/5 |    |    | |
| 3/5 |   |   | |
| 3/5 |  |   |
Aside of 5E (five earth), all of those teams are only viable if you have two good totems. If you only have a good earth totem, stick to 5E.