[Baalz]

Well, that's a matter of opinion but I can give you mine which of course is based on my own experience and prone to be proven wrong by clever players. Not familiar with the mod nations but my feeling is in LA:

Grossly overpowered - R'yleh

Top tier - Ermor, Gath, Marignon

Above average - Abyssia, Bogarus, Mictlan, Agartha

Average - Acro, TC, Atlantis, Utgard, C'tis, Pangea, Midgard

Below average - Caelum, Ulm, Man, Jomon, Pythium, Patala

So, based on my own (completely pointless) ranking looks like the forces of darkness (Abyssia, Pythium, Bogarus, Patala & Agartha) are composed of three above average nations and two below and I can't really assess the power of team goody two shoes as it's 3/4ths mod nations I'm unfamiliar with and 1 yet to be picked.

Marignon would be a good choice for team good and brings some heavy firepower (angles, blood magic, good combat magic). Mictlan also would not be a terribly unthematic choice, if the forces of men wanted to recruit the jungle barbarians to help round out their diversity. Both would bring powerful non-unique national summons to the table and good blood magic and astral helping shore up what team good probably needs shored up.