[@Lucius Cypher]
Well said. Just like it isn't a forgone conclusion fighting Vesta. Sure it will be bloody difficult to take her on, especially considering 99% of her fights are on the GROUND. Hence why she will have a huge advantage there but doesn't mean that she will win, always a chance of someone using wind magic for example to flip about in the air and catch her off guard.
However say she's fighting aboard a ship? While there is earth beneath the water, there isn't much else to use and it would take time to get to where she is if she's manipulating it. (Hence why she keeps a pocket of pebbles on hand, better than nothing).