Kindler: What you have to remember is that with Wizards, quality > quantity, and Ebenezer and Harry are not just "two dudes."
One is the Blackstaff, probably one of the most deadly wizards on the planet who is personally responsible for nuking a Red Court warlord and his whole retinue, and just generally responsible for a whole hell of a lot of dead Red Court. He's also one of the leaders of the White Council.
The other is a war hero already and an inspiration to a large portion of the White Council; he is growing in power, and he's probably the direct influence and inspiration for a lot of the front-line fighters, like Ramirez.
It's not taking out "two dudes." It's like taking out the President and his cabinet, and breaking the US's nuclear weapons all in one go. Remember that of the 1000 or so wizards in the White Council, only a fraction of them are combat capable, and only a fraction of those come anywhere near Ebenezer or Harry's ability.
So the Red Court isn't just taking out "two dudes." They're taking out two extremely important weapons, both physically and morale-wise.
As for the wards? You're right, they don't know he's at Edinburgh, but at the same time, they can't afford to assume he's not. You don't win a fight by preparing to face an opponent's bare-minimum defenses; you win it by preparing to face him at his best. Anything less and they face the extremely real risk of Ebenezer going, "You call that a spell? I'll show you a spell," and dropping another satellite on their heads.
Granted, Harry and Ebenezer are two highly visible, important players, and killing them both would be a big morale boost. I'm not saying that killing them isn't valuable, but the way tried to do it was dumb. There was no reason to even bother with magic in the first place. The benefits of the ritual were much, much lower than the risk and the cost. I prescribe to the Eeb's school of pragmatic villainy: low-risk murder attempts in enough quantity to get the job done.
Even as a show of force, it wouldn't have been impressive. Like I said before, what are they going to do, brag? "I killed a Senior Council Member and all it took was a thousand human sacrifices and weeks of preparation, alongside a coordinated assault against the White Council with a biological agent that made them sick!" Who are they even trying to impress? It's not like they're best friends with anyone in the supernatural community; the White Court hates them, the Denarians think of them as little more than parasites, and Faerie has nothing but contempt for them.
Maybe as a nuclear deterrent, but I don't know of many of the Council's family situations. It seems to me that the curse requires either a blood relative or direct DNA, like the Storm Front curse. How is that any better than any other magical assault? I get that it would work if Eb was behind the Edinburg wards, sure. But, again, the cost-benefit ratio is way, way skewed to the "cost" side. Imagine how much
money they had to spend to get this done without mortal authorities knowing anything about it.
Even if they don't value the human sacrifices, which I get, the whole approach is just needlessly complicated for what they're trying to accomplish. Hell, I'd be willing to bet that Kincaid would even take the contract, given his animosity toward Ebenezer.
To me, that means either their goal isn't what Harry says it is, or they were manipulated into doing it.
Now, however, I'm thinking about it in terms of the Whole Pie; Martin delivers the Fellowship of Saint Giles to the Red King at this point, so if it was coordinated, it makes more sense to me.
But shouldn't the Red King and the Lord of the Outer Night be prepared to capitalize on this? A series of coordinated attacks—the disease, the Fellowship crumbling, and McCoy and Harry going down—
should be followed, immediately, with a sweeping assault. It doesn't look like they were doing that. It looked like they were throwing a party before they'd won—and they
could have won, if they were smart about it.
I dunno. Maybe Talby16—welcome to the Forums, by the way!—is right in that the blood addiction and mental instability is what guided their approach to this.