Im mining CN heavy and CN saber with JCE GPU miner (b18 version). 6x vega 64 (1050 memclock reg edited) ... Hashrate is 10700 for all of them about 1800 each.
For monero CN v8 it seems SRBminer is the best right now.
i didnt try xmrig and xmrstuk but i dont think that they can give more hashrate.
Hope this info help.
Sorry my English is awful