Ditto what others said. Only use people you know you can trust.
You could take applicants into your legion (the original, not the new one) and get to know them, then make a decision on who gets the job based on which people you think are best for it.
Also, rank is not a good indicator of leadership ability or trustworthiness. There are some wonderful leaders at lower ranks and some people at higher ranks who you really don't want anywhere near your legion, much less leading it.
