[Vicious Love]

Serpent Cult seem much weaker than they are, simply because they can't even begin to measure up to base Pythium. The same could probably be said of Return of the Raptors: it's underpowered, but seems even worse in comparison to its Caelum's national theme.

Then there's Barbarian Kings, which is the weakest theme of a relatively weak nation. I'm not sure it's possible for Barbarian Kings to appear even weaker than it actually is.