Claymore seems to be working as he doesn't write anything here. So we should stay tuned ;> but if he wil end miner before price dump below 0.1btc?;>
Yeah I got working miner today but I don't want to release it until I get at least 100h/s on 390, it will take some more time.
You are correct, with such drop in price it seems everyone will mine ETH again when I release ZEC miner

Claymore,
100 sol/s per 1 x 390 GPU???
a 5x390 rig which can do 150MHs of ETH mining, can do 500 sol/s ZEC mining?
Per card of AMD 390.. how much zcash we can earn?
It's highly volatile, but you can work it out with simple math:
1) look up the total network hash rate.
2) look up the current block reward.
https://explorer.zcha.in/So 100 Sols/s / 3.4 Million Sols/s * 1.5 Zec/block * 576 blocks / day = 0.025 Zec/day
but be aware, if Claymore releases a miner capable 100 zec from a single 390, the network hashrate will probably tipple overnight.