Just to toss in my two cents on the crown thing; I don't think it's a good idea even if DP says it's possible.
Even if we pull it off doing so would empower and antagonize a unified faction within the Imperium, which is a headache and a half at best. At worst it's a critical weakness in that we can't be sure the fey will stay pinned to the story we tell forever, and when they got loose they'd make a huge mess of things.
There's also the practical side of actually pulling it off. The guy can't even move himself, so we'd need to break into the heart of their power in the feywild of all places to do it. This is both incredibly dangerous and a vector for them to mess with us.
Even if it's a relatively simple set of actions, crowning the guy would still effectively be an act of powerful ritual magic if it had any binding properties at all. Performing that kind of ritual at a site prepared by people who want you to die in a fire is a horrible idea, especially when they can bend the local laws of physics against you at inopportune times.
Frankly, we can't safely do something like this unless we're already in a position to dictate any terms we like. In my opinion it's a better idea to use our resources now to advance our goals instead of hoarding them in pursuit of something we might come to regret.
