-dcri Decred intensity/Siacoin. Default value is 30, you can adjust this value to get the best Decred/Siacoin mining speed without reducing Ethereum mining speed.
You can also specify values for every card, for example "-dcri 30,100,50".
You can change the intensity in runtime with "+" and "-" keys and check current statistics with "s" key.
For example, by default (-dcri 30) 390 card shows 29MH/s for Ethereum and 440MH/s for Decred. Setting -dcri 70 causes 24MH/s for Ethereum and 850MH/s for Decred.