Coin/Algo: Alloy / cryptonight-alloy
How would I determine optimized settings? I guess I should see what I get on CN v7 to see if it's close to that 900 number. any suggestions of coins to try? Sumo?
Oh. Alloy is a harder variant of CN Heavy. You shouldn't mine CN-Heavy or CN-Alloy with CPUs, since their drop of hashrate in comparison to CN ist enormous, whereas GPUs aren't affected in the same way. CN-Heavy and CN-Alloy are tailormade for GPUs. How would I determine optimized settings? I guess I should see what I get on CN v7 to see if it's close to that 900 number. any suggestions of coins to try? Sumo?
Consider to mine a CN-Lite coin with your CPUs. You may reach around 2700 H/s with CN-Lite (Aeon, Turtlecoin) or about 1300 H/s with CN-Fast (Masari). 
If you want to mine CNv7, why not Monero? 
Sumo is back to ASIC friendly original CN. It's absurd to mine an ASIC coin with CPUs. 
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I didn't know that about AMD FX Piledriver dies. Your response is very informative. Thank you for that.
No problem Howdy
Just to catch up, I finally got around to test mining some Aeon and it is in the ballpark of your estimates. I hit about 3300 h/s with my 2x Opteron 6376. It's not bad but also not great. Pros: 1. It works. 2. hash rate seems okay
Cons: 1. I couldn't cover power costs to mine it.
It's still interesting I may mine a few despite the power cost. Or I could probably just buy some... idk yet. At least I know I can keep my eye open for new cryptolight coins that may emerge.