when it comes to the elements that you want. clay and sand i could give you some good combinations.
since clay is another form of earth then that is the way we would treat it
Earth:
When you use an earth jutsu it's always good to follow up with a wind or water or fire for the following reasons:
- Wind, as the opponent will try to use lightning to block the earth or in your case Disable your clay bombs, and wind is strong to lightning
- Water as this will make the opponent shock themselves if they use lightning
- Fire turn the earth for additional damage, because when you use earth, they wont use water as water is weak to earth