Have the kings of the deep been nerfed since Dom1/2? They used to always get their randoms in the same path, so you could easily get level 2 in other paths... I haven't played them since Dom3 and the changes to the random system, though.
This is probably as good a thread as any to point this out; the answers to a question like this would be really well-suited for the woefully inadequate dominions 3 wiki (hint, hint).