for skorne, karax aren't terrible, they just aren't nearly as good as other infantry options for the same cost. I would add immortals, I know some people use them but they just don't work well IMO. they're slow unless you take a mediocre 3 point solo, and they don't even have souls to offer the guardian who has to babysit them.

for circle, I disagree about the woldwyrd. they're actually a ton of fun, and very irritating for some opponents. double cost spells, and boosted shots against any upkeep spells is very attractive. reeves definitely aren't used much, though. and war wolves are pretty lame, especially now that gallows groves have taken over the spare 1 point slot that wolves used to fill. the argus is also not a very popular choice