[LDiCesare]

Considering both Niefel and W5E are cap-only, after a few turns expanding and earning lots of gold, the limiting factor becomes the dominion value, which limits the number of sacreds. I tested such setups this afternoon, and W5E tend to freeze after 4 or 5 rounds, whereas jag warriors freeze after 2 rounds. The thing is, to assemble Niefel army, I had to spend all my money, whereas TC or Mictlan both had much more money left to spend on whatever they liked. Mostly wizards for research in the case of TC, and you could probably buy enough archers to make them painful enough for the giants (although I had picked E9N6 bless for the Niefel, so arrows wouldn't really be an issue unless flaming).
I thought the W5E would do better because I know they can shrug heat auras from Abysia fairly easily, but Niefel's cold is much stronger.