I see. We need a dual pair that would give twice the performance of Rx580's on the 1080 TI's.
Clearly it's not ETH, ZEC is a very viable candidate, but without dual mining it's still not good enough. Any suggestions welcome
whattomine.com
Check there and if the coin you're looking for isn't there it doesn't exist or is brand new.
Equihash is an intensive algo and doesn't support dual mining as previous stated.