I don't have 1080 ti, but as it use GDDR5X it should be the same as for 1080 I guess = not for ETH mining
That's why I asked him about 1060, because Nvidia is not "neck and neck" to ETH. Only low end cards are.
On 1080/ti Zcash and Signatum are 70-80% more profitable (or a little less if compared to dual with decred).
Dual .mining with correct dcri was always profitable on 1080/ti. Because 1080/ti has a lot of cpu power which is not used by daggerhasimoto algo.