I am trying to figure out the best way to route all traffic from a router station pro to Mikrotik routerboard. I am not fond of Ubiquiti’s routers in the least, but the pro can support 3 xr2 cards in one board. The router station is flashed with ww drt, the router board is running the lastest router os. I like router os and will not give up my winbox 
I guess proper configuration should be applied to the user router, and MikroTik router is not involved here, isn’t it?
Just like Sergejs said - you are asking about DDWRT configuration here, off topic …