The plan that Elena came up with was a very simple one. The only reason why the city of Carinossa was able to play such tricks on them was because the three cities had no one powerful to rely on. There were a few people with the potential to reach the A rank but they would need quite some time to get there. For that reason, it was not possible to wait for them to grow up.
For that reason Elena wanted to use one of her clones here to protect the three cities. Elena was playing many of her clones in different parts of the world and these three cities were an excellent place for her clone to be.
These three cities had quite a few good artisans and Elena could use her clone to interact with them in order to increase her own understanding of craftsmanship. Elena was a higher level crafter than the dwarves but as they were using completely different techniques in their forging process, that would still be quite helpful to Elena.