I think Blood of Humans has a cheaper blood hunter than regular Abysia.
Last of the Tuatha also has more expensive mages; their basic research costs 140 gold, while Man only needs 80 gold to get the same research level, and Nature 1/Air 1 does not seem so great.
Return of the Raptors has one purpose: avoiding being called one of the biggest threats around.
Hmm, perhaps another game featuring the more uncommon themes/nations might be in good order...