Ethos dual mining?

Hi I have a stable ethos rig that is mining ETH at 157 MH.
This is my local config file. What do i need to add to get dual mining to work?

ether
loc efdfac rig1
globalminer claymore
maxgputemp 85
stratumproxy enabled
proxywallet 0xf7fcbcf4ff189d41b6dcce6d0aba4294.....
proxypool1 asia1.ethermine.org:4444
proxypool2 us2.ethermine.org:4444
flags --cl-global-work 8192 --farm-recheck 200
globalfan 85
globalmem 2175
globalpowertune 3

thanks in advance.