Percentage of power was what I had in mind, not percentage of headcount. A Jager counts as how many ordinary foot soldiers - 10? 20? Considering the battle at the bridge as one example, quite a few.
They are in the astronomy section of the Royal Libraries. We've had foreshadowing that these people have the best maps and charts. I think some sort of indication of where Skifander is found. It has to be something that Zeetha would immediately recognize as being important with a casual glance.