This isn't a who would win in a fight scenario. I've been thinking about the Fomor; as one of the major powers in the story, and also looking at the few individuals we have seen of them, and I've come to a sad conclusion. They are second rate villains, at least compared to the Red Court. This is true if we look at the Fomor both as individuals and as a major power. This makes the Fomor something less than compelling for me to read about. There's an old saying that your story is only as good as your villain and the Red Court were pretty good at being villains. That's true even if there is a greater power or powers that manipulated the vampires for their own ends. To me the Red Court seemed to be scarier, more formidable and more compelling to read about, both as individuals and as a major supernatural power.
Look at the major Fomor players we have seen so far. (I don't remember their names, which IMO is a bad sign.) There was the one that Marcone killed with a magic bullet in the short story Even Hand. This Fomor managed to fight his way through Marcone's goons and get past Ms. Gard, but you would expect a supernatural heavy hitter to be able to do that or at least get close to doing that. However, he was rather stupid; and with Gard's help Marcone suckered the Fomor Lord into a death trap.
Then there was the one who set a bomb to go off at the Swaralf's party, whose plan was foiled by Molly. OK, while Molly gained some experience working with Harry she was really taught how to think and fight by Lea, so Molly had at least one really good and ruthless teacher and an example of a mentor who never gives up. However, Molly was still something of a newbie in the kind of covert mission Lea gave her, but despite the risks, setbacks and close calls she underwent, Molly thoroughly defeated the Fomor Lord's plan and publicly exposed his treachery. Plus, he was something of a sniveling coward when he faced Mr. Etri's wrath.
Then there's King Korb. I don't have to the exact quote, but Mab told Harry that Korb was more powerful, dangerous and treacherous than Harry, or words to that effect. (If anyone wants to find the quote and post it here, I'd appreciate it.) Personally, I found King Korb to be something of a joke. Openly making himself Ethniu's slave wasn't much of a power move. I'm surprised that Mab, or any of the major players at the peace talks didn't call him out for that, or Harry make some snarky comment on the subject. Korb was cruel and vicious, but his henchman Listen is clearly smarter than he is. Korb just wasn't impressive or really all that scary. When the action was at it's hottest, King Korb was mostly overconfident, petulant or both.
The Fomor henchman Listen has been good at his job, but he's not really in Harry's league yet. Listen would need a major power upgrade or have access to supernatural assets we have yet to see in order to make him into a truly dangerous and interesting foe.
The Fomor priest that Murphy fought in the short story Aftermath was a pretty dangerous opponent, but Murphy was just a vanilla mortal, so that bad guy was only a compelling enemy in that situation. In a larger situation like we saw in Battle Ground, he would have been nothing more than another Fomor grunt.
The creatures that the Fomor can create are disgusting and have some sick and scary qualities, but by themselves they're just cannon fodder.
Now I don't want to look at everyone we met from the Red Court. Mostly because I've written a lot already, but also because I don't think there are any really weak or boring Red Court characters. So I'll focus on just one character, Bianca. Bianca was the first sentient and dangerous nonhuman supernatural enemy we saw Harry match wits with. For some time we have been able to discern that Bianca was manipulated by beings and powers smarter and far more powerful than herself, but that doesn't really matter. At the time she went up against Harry, Bianca was scary, her motivations seemed fairly logical and her plan to take Harry down was a pretty smart one, overall.
The beautiful person who is really giant blood sucking bat like creature underneath its pretty exterior camouflage was a really well developed idea that Jim came up with. Add in that its saliva was addictive, so Red Court victims were often not just drained out, but made into willing vassals and slaves, made Bianca and her type both disgusting and frightening at the same time.
Bianca had been humiliated by Harry in her own home, at the very seat of her power. Even if she hadn't been haunted by the ghost of her assistant and lover that she killed, Bianca still would have had good reason to want to get even with Harry. And the thing is, Bianca's plan was a pretty good one. Her chosen allies were properly distracting in the case of the Nightmare and powerful in the case of Mavra. She also couldn't have known just how stubborn Harry could be. A lot of other wizards would taken her deal to escape with their lives at the cost of someone else, especially if that someone else had already been half turned into one of the Red Court. In their final confrontation, there was almost no way that Bianca could have figured out that Harry would make an inspired decision to call up the ghosts of her past victims to use against her, or that it would work, and no way she could have countered it. Bianca just had really, really bad luck that day. One more minor point. Even her henchman and henchwomen, Kyle and Kellie Hamilton were pretty freaking creepy in their own right.
Finally, as a major power, the Fomor are somewhat nebulous. They don't have a solid feel to them. On the other hand, a nation of blood thirsty vampires is something truly nightmarish. I don't think I need to say more than that.
Mostly, I wrote this because I want to see if others agree with me, or if anyone thinks the opposite; sees things that I've missed that make the Fomor more compelling as villains than I do. Also, I guess I'm hoping Drakul will be more interesting than what we've seen so far. Drakul was in just a few brief scenes in BG so there's no way for us to know where Jim is going with this character, I just want something better than what we've had (so far) as a replacement for the creepiness', terror and fun that the Red Court brought to the table.