although 570 requires voltage offset to reduce power draw to equal that of a 470
1070, 1080, 1080 ti for equihash (zec)
They all get about the same hash per watt
so whatever you can get the best deal on
Would be impossible to say if the amd or nvidia cards will be better in the long run, way to many variables. I think they will be about even.
So make a rig of each
i would not mine zcash with nvidia, feathercoin and lbry are much better, for the other part i agree with you, but the 1080ti is not very good while it has a good hashrate it cost too much compared to 1070
You should check your profitability again...Feathercoin/Nescrypt and lbry are way down my list of coins to mine with Nvidia.
I'm finding blake2s, skein, equihash and Nist5 are the best at the moment, but it is always a moving target
blakes2s could be skein, the profit is actually lower than what it say on yiimp, equihash is worse than lbry i don't know what you are mining but hush and zcash are behind lbry and feathercoin at the moment, nist5 i'm not aware of any good coin for that algo, are you talking about new one?
Check out zpool.ca
The stats on yiimp and zpool on the right of the page don't actually show you the most profitable because your card/s don't get exactly 1 MH/day on all coins.
It varies greatly, so you need to really take those figures and then add your card hash rates to determine the most profitable coins.
Nist5 = solaris
blake2s = Verge, Taj, Netko, Neva
skein = aurora, digibyte, unitus
zpool pay 30% less than what it say not good for mining, but yiimp show that skein and nist5 are the same they give you 250k satoshi with one 1070, which is better than lbry yes, but lbry is still betetr than zcash that what i said in the beginning