Changed the -dcri on SIA and now I'm getting 51-52Mh/s on ETH (23+27) and around 723Mh/s on SIA. Now the debate will be is the extra 4-8Mh/s worth it profit wise for ETH vs the higher hash rate of SIA.
You can fine tune your -dcri settings while claymore is running. You hit the + or - key on your keyboard and it will adjust... watch it for a few minutes and decide if you want to up or down again. I think the default is 30 out of 100 if you don't specify anything in your command line/batch file.
In my opinon, getting a better rate on Eth is the goal... with whatever rate you get dual mining sia to be the gravy.