Mmh, personally (and it could be weird I admit
) I'd prefer something new and strange to balance Hinnom (of course if the devs decide it should be done), something like the Shattered Soul trait was for tartarians.
Hinnom already has the distinctive trait Baalz talked about
but it seems it isn't decisive to balance the great strength this nation has in... well, possibly almost any field. ^^
As I always say I wouldn't like this game to became PERFECTLY balanced - it would be boring as hell - but with proper use this nation seems able to steamroll almost everything ^^ My suggestion of a "Guide" or at least some tips about which weaknesses one could exploit (in the positive meaning) to beat Hinnom was not entirely ironic