I haven't be able to get up to speed with the thread lately.

I am running two XMR rigs, 4 Vega 64 each. Windows Fall Creator's, August 23 blockchain drivers.
Total hashrate is 16060H/s (~2007 per card)
Using hellae's 1100MHz regedit (1407/900, 1100/905 probably)
xmr-stak-amd with 1932/1932 threads on each card
~1525watts from the wall (220v) with Corsair RM1000is

Is there any benefit switching to xmr-stak or cast-xmr?
Can I get any more efficiency out of them?

Thanks in advance!