**Update:
I have the 6 card AMD Rig up an running.  I updated windows 10 to 1803.  Still kept crashing.  I rolled it back to 1706 windows 10.  ran display driver uninstall.  Reinstalled, repatched the cards, re downloaded LOL.  It has been running steady for about an hour.
Cards  / Results - Avg:  (plus ETH comparison)

GPU 0: Sapphire Nitro RX 570 4gb - 19.5 sols (gets 30.9 mhs on eth)
GPU 1: Powercolor Red Red Devil Gold RX 580 8gb - 21.3 sols (Gets 30.5 Mhs on ETH)
GPU 2:  MSI Armor MK2 RX 580 8gb - 22.3 sols (Gets 30.7 Mhs on Eth)
GPU 3:  Sapphire Nitro RX 580 8gb - 20.5 sols (Gets 31 Mhs on ETH)
GPU 4:  Powercolor Red Red Devil 3fan RX 570 4gb - 19.3 sols (Gets 30.1 Mhs on ETH)
GPU 5:  Sapphire Pulse RX 570 4gb - 21.3 sols (Gets 30.5 Mhs)

So 123 sols on BTG (144,5)
where it gets 183 mhs on Ethash via claymore

Power difference - 980 watts on LOL - 1150 watts on ETH.

As i was typing this, LOL stopped hashing.  No error displayed, and system did not crash / reboot.  It simply stopped hashing.  Fired right back up and hashing at about the the same rates as above.  
I will continue to test
(I am on BTGpool.pro for reference.  Also setup a bat file for Zelcash on Equipool that i will try out)

Thanks
James