I haven't seen your "Fire of the Dragon" or "Into the Fire" cuts, so what I'm saying here might be redundant, but my thoughts on the Gandalf scenes are...
Lose the scenes at the Witch-King's tomb. It's a cool, creepy set, but it holds the story up and it makes the focus too much on "Sauron is summoning his servants", which to me seems like PJ is trying to make The Hobbit as big and important as Lord of the Rings. I think it would be better to have Gandalf go directly to Dol Guldur. It would mean having to edit Galadriel's message to Gandalf so she doesn't tell him to visit the Witch-King's tomb.
Gandalf's arrival at Dol Guldur - could be edited to remove Radagast, but I think he's a character who works well in small cameos and as the previous film should have already established that Radagast lives in the Mirkwood area, it shouldn't be too much of a surprise to see him with Gandalf without actually seeing the two meeting. This would be quite consistent with Menbailee's AUJ cut, and possibly Galadriel's message to Gandalf could be replaced with flashback-type shots of Radagast telling Gandalf "There is a dark power in Dol Guldur" or words to that effect.
I would also cut the scenes of the Orcs talking to each other in Orcish ("He will find us", "Yes, he will"), and the scene of Gandalf in his cage with the orc army marching out (again, I feel this is PJ trying to be as big as the march from Minas Morgul in ROTK). But I think these have also been discussed in the thread.
