User blog comment:IamJakuhoRaikoben/Chapter 442: The Law of Space, Review./@comment-1153699-20150629150307/@comment-4945830-20150629213401

For all we know the number can only mean in the order that the person joined the Spriggan 12, do not assume number always means rank in power, and even if it does that does not necessarily the gap in power between each one is too significant, it could be very close. Even though the Gods of Ishgar and the Wizard Saints ranks were judged by numbers, we still have not really seen any battle feats from Walrod, who, if I recall right, said he is not that good at battle, so Jura could be stronger then him in a fight despite the numbers, though he may have a higher magical capacity then Jura. Numbers can mean power but they could also mean magical capacity, skill, among other factors, do not assume off the bat that she is the weakest unless it is stated in the future.