Which elemental affinity is the most useful in real life?

[Pukkake Pokayo]

<div class="bbWrapper">Well the Earth is like 2/3 water + global warming lol<br /> <br /> Plus humans are already capitalizing and manipulating water &amp; air to harvest energy.<br /> <br /> So raiton or doton</div>

 

[lndra]

Wind.

 

[Chaosmark101]

Water or Lightning

 

[TNC Xlll]

water and wind release

 

[Aquamarsh]

Wind or Water

 

[Beans2]

Definitely earth.