Yes, but we know sometimes Harry is not a reliable narrator. Still, I think you are right. I have sustained since I first read BG that one of the reasons Marcone did not go for the Eye was the fact that Harry could kill both of them. Yes, Harry was wasted, but it was a large bet. If they were underestimating Harry's remaining power, they would be screw. And both of them knew that Harry has a history of winning against the odds. They also know Harry stubborness. If he managed to gather a little willpower to Forzare the spear, they could die. And I suspect Namshiel is not as brave as Marcone. (On a side note, I also have the theory that Marcone himself did not want the Eye near a Fallen, even if it is a Fallen he was hosting.)