Please make custom settlements like Minas Tirith actually work and easily defendable, if at all possible.
I know that it the Medieval 2 mod due to limitations defending those custom settlements sucked, and attacking them too. So buggy and the walls couldn't be destroyed due to limitations.
It is stated that three of the Nine Rings were given to Men of Numenorean race. Also keep in mind that the Nine were among the Great Rings of Power. There were a multitude of lesser Rings that Sauron gave to men.
Well, Elb or Elbe (Old High German) is the feminized form of the ancient word, and refers to female Elves. Tolkien created the word Elven and Elves instead of Elfen and Elfs. Tolkien also used the word Aelf, which is another form of the original word in Old English.
There most certainly is visible magic, but mostly it is not shown. Reference the fight upon Weathertop with Gandalf and the Nazgul, upon the mountain and inside Moria with the Balrog and Gandalf, Gandalf verses the Nazgul on the plains before Minas Tirith, the overthrowing of the gate of Minas Tirith by the Witch-king, the telekinetic cleaving of Frodo's tongue to the roof of his mouth by the Witch-king at the crossing of the Fords, Gandalf defeating the Wolves before the entrance to Moria, his staff while in Moria, and his kindling of fire upon Caradhras, his fireworks, the telekinetic moving of Frodo's finger into the Ring, etc. There are many, many other more "minor" things that would be too tiring to try to remember. Also keep in mind that Sauron and the Istari are Mair, spirits who from Heaven to Earth came. They would exhibit terrifying powers (and indeed they did). In fact, if you read the chapter of the book on the Siege of Minas Tirith, and the area when the Witch-king took Osgiliath, wherever the Witch-king went his enemies trembled in fear and grovelled on the ground, helpless. A similar effect had Gandalf on the Orcs, most easily seen during the Battle of Helm's Deep.