Just want to point out that Nvidia cards also are able to dual mine ETH and SIA. Though it has less hash rate for ETH, my GTX 1080 still earn more per day mining ETH and SIA than ZEC.
ETH is a rather low-profit choice for NVidia cards compared to many of the other options they're good at, as is ZEC at this time.
I was mining on theblocksfactory for their DGB-Skein and DGB-Groetsl pools for a few days, and also tried the suprnova related pools - it's a bit iffy though given the VERY small net hashrates on all of the options for mining DGB (it's a multi-algo coin like Myriad).