Did you test RX OS with any cards R9 (not 2xx)?
I didnt tested 380 but one of my fried tested and its working.
He had problem with OC but i propobly fixed this in v1008 update, anyway i would need to ask him again.
About ZCASH
Yeah i will tomorrow sacrifice whole day for that.
I already compiled some miners but they were unusable and still in alpha.
So i will look again tomorrow, compile it, and make update with new option in dashboard.
I will propobly select 2 diffeent miners even if they will vary in speed, because we need more options in case one miner would be incompatible with most pools.
As i see it, there will be mess becasue fre projects are in progress and each uss different stratum protocol or no stratum at all so it would be mess like wieth etthereum