Okay the problem is, while it is a simple mirage technique, for the most part you would need training to make the mirage clone. Really you would. Based on everything from KHR. You likely wouldn't be able to utilize such a technique until later in the story when you learned about and could properly utilize the most flames and their illusionary attributes. 

And sorry Ama I'm not much one for arguing on average unless joking or necessary. Okay that's a lie. I argue therefore I am. Regardless. I need to be adamant on this one.