
The data set is here, along with a graph of the derivative, showing that it becomes harder to gain Effect in Protection the higher you get. As you can tell, a couple of my data points may be a little bit bad, so I am still looking for good numbers for effect levels below effect 16. By "good numbers," I mean the lowest possible level of the spell that grants the Effect shown in parentheses. Of course, Jon may have designed the spell to gain levels that way.
I am relying largely on Eternal for the high numbers in the graph, as he has the highest Protection in the game right now (I have the second highest). I'm predicting that you'll graduate to 22 between level 88k and 90k.
Discussion is encouraged :)