i have a rig with 5x rx480. Speed around 145mhs and just got around 0,75 eth/ month. with bill electricty around $0,1 very less profit to mine eth today. But for amd i think eth more profitable then other coin...
For AMD cards from RX 4xx/5xx series and above the best profitable algorithm is either dual mining, personally mining DaggerPascal with 2x RX 480 in my office and making 0.0004 btc daily while mining only Ethereum I can make about 0.00036 btc daily so clearly the dual mine is the best for AMD cards right now and why not even for Nvidia with latest version of Nicehash 1.8.1.5 which I am using.