Sorcery

[Boromir88]

I found Tolkien's words in that letter to be inconclusive by virtue of not defining his terms (which we don't expect from him seeing as it's only a letter), so I looked them up in the dictionary myself, which is my reason for equating goetia with sorcery and magia with spells.

I agree, it's tough and inconclusive...like I said, I wasn't familiar with the definition radagastly gave as being applied to Sorcery, it just seems to fit better with Necromancy...it's fully possible that I'm wrong and reading too much into everything.

I still think the Witch King was more powerful; and if Sauron had regained the possession of the Ring, the Witch King would have become much more powerful though he might not have outranked the Mouth of Sauron.

I tend to agree. Simply because we don't know about the Mouth of Sauron's capabilities, but we know what the Witch-King to do...and seeing as he was the one that commanded the army, that makes me think he was more powerful than the Mouth.

Sorry, can't be any further help with the Mouth of Sauron's age.