The portal bottleneck gives us a very big advantage. Feats of power shown in Dresdenverse do not lend themselves anywhere near close to just cutting through properly massive nuclear blast rated doors especially with magical reinforcements.You're making assumptions about the timetable. Denarian sorcerers can do stuff like raid Arctis Tor when the defenders are serious about keeping them out, and Nemesis has made plays to raid Demonreach before. Hell, get around the impassable portal is literally its job.
We do by means of always having a clone inside that can get to and from the courts on their own.Note: This would require an interdimensional phone of some sort which we do not currently have.
Yes, I agree, which is why I am hesitating greatly. I think defending it will come to stunting in / rolling for initial portal's location.Yes, that is how DP described it. Problem with this deduction- We don't know how long it would take to disconnect him from the land and drag him the rest of the way over. It could be several months and any delays would extend that time frame. Depending on where it opens up defending it the way you've suggested could prove unviable.
This is a very heavy decision, which should be made in the best interests of our citizens, who we have responsibility for.