has this been done before?
anyway, these are my views:
1) Skelton Archer - level 1 ranged and very numerous
2) Blood Fury - the ability to strike and return is quite useful inded and the speed is fast enough to make it useful
3) Master Hunter - ability to shoot twice is always welcome even though they have low hit points
4) Vampire Lord - ability to drain life, no enemy retaliation, vampires has always been the strongest of their respective level
5)Deep Hydra - it hitpoints and ability makes the Hydra the strongest creature in the level 5 region
6) Pit Lord - ability to cast area damaging spells makes this one of the strongest creatures in the game
7) Titans - ranged, good damage, nice abilities, it is stronger than black dragons
so far, the haven town seems the weakest because it does not have a creature that is strongest among their respective level but it is most balanced than any other towns. The inferno is actually the weakest.