We have silentarmy built into zcash v1.0.0 running stable with one card one thread at 22H/s rx480. We also have multiple threads that can be ran from our zogminer repo.
I will be working on getting zash to use more threads as well as multi-gpu support some more.
I have it running stable with two threads in zcash 1.0.0 now. Average solution rate on mainnet 32H/s