stll no gpu miner? 
there is a rumour that wolfo is working on it for drksilk as they will use aragon2 for POW 
Never trust rumours
GPU miners for Argon2 are nonsense.
They also said that with Scrypt.
They didn't. Look up the details, GPU miner for OPES would be just as fast as CPU or even slower.
cpuminer-win64-haswell.exe --algo=argon2 -o stratum+tcp://opes.suprnova.cc:3084 -u xxxx -p xxxx --threads=7
Do I need anything else in my bat file?