what equipment are you using modzer0?
I have just one rig, with two RX 570s, two GTX 1070s and a GTX 970 that was formerly in my gaming PC. I always knew the 970 was way less efficient (I get around 17.1 MH/s with it), but this thread has me wanting to calculate if I couldn't do better by just getting rid of it, increasing the power limits on the other cards and dual mining decred or sia (I feel like the decred or sia would be worth more than the 17.1 MH/s of ETH I'd lose...)
My 1070s are Zotac minis, and I'm really impressed with them. They were cheap (as far as 1070s go), have dual fans but just one 8-pin power connector, and the build quality seems excellent. They did 26 MH/s each out of the box, and very easily overclocked to do 32.3 MH/s each (using only 100 watts each and temps are only 50-60C). If you're ever considering new cards for mining, those are worth a look. If I was going to expand more I would be looking at more of those exact cards.