ottol1998, if you don't have a Terrafication yet. Then I advise you instead use Terrafication, just defend (or use buff skill like Shield Defense, if it is the 3-rounds training). If you think you can use Stone Wall instead the Defense, then it is not working. Because the Stone Wall and the Shield Defense are both the defensive buff skill, and they can't combine. You will only end to waste SP.

Earth's orders, without terrafication:
3-rounds: Tree bind [enemy] -Shield Defense [pet] - Blockage [enemy]
4-rounds: Defense [player] - Tree bind [enemy] - Shield Defense [pet] - [top priority] Blockage

But I do want to give an advice you to get the skill Terrafication. It is a very powerful skill, much better than Tree Bind.