Like I told you on Steam, you could go with stuff-breaking for the Earth, but now that I think about it you could make it shoot stalagmites to act as barriers, like you could have places where water flows or something and integrating some kind of barrier erecting (and dispelling) could be an interesting take on the earth element. I'm not really digging that "dig-and-find-under-yourself-caves".
I think Tales of Zestiria have items for both enemy repeling and attracting items and a few characters have support talents to attract certain enemies, so I think you shouldn't probably worry that much about it.