Thanks Shandara, this confirms a couple of questions I've been pondering about ArP.
1. With these assumed mechanics, at least without shattering throw, SS/FF is never a DPS loss even if we're hit capped, as some have argued.
2. At around 3650 armor pen, this formula simply breaks down. This is because the value of (1-armor/(armor-22167.5 + 37400)) is going into the negative. Not only do you have negative armor, it is so negative that the denominator is negative. 37400-22167.5 = 15232.5, the constant for level 80 used in the ArP formulas. I'm wondering if something is missing or if this really would be theoretically possible, but we just don't have 3650 available so it's moot.
I came up with this little plot graph using the formulas in the spreadsheet:
http://spreadsheets.google.com/ccc?k...1Z8P6cXU2GGa1g