ddProxy supports POC+POW multi-mining, it mines CPU coins during idle time of POC. This is TSX template for OnePool, please paste into config accordingly.

POW: {
    Enable: true,
    RemoteCtrl: true,
    MinerApp: "xmrig\\xmrig.exe",
    Params: "--donate-level 1 -o tsx.pool.onepool.co:55552 -u Pool-Username:#HOSTNAME# -p x -k",
    Admin: false
},