So basically it's a catchall for everything not covered by other prot. spells. I appreciate your typing that out for me. I seem to keep forgetting what the spell does, so I've copied your post to remind me if I forget again. 
Although I will argue with your assessment of DC. There are quite a few spells that run the challenge of being most useless, making it hard to pick a winner. Stun, Awaken, Create Food... there are a few. I think I might pick Stun as most useless, as I can't recall ever seeing somebody affected by it.
