One month ago my rig with 6 of 1070 could mine around 1.55 of ZEC per month.
Now, it is close to 1.15 ZEC.
So, the difficulty was changed a lot.
But I would continue to mine it now.
yep, the difficulty will be rising more and the price will be going down, because of crowds of AMD fans switching from ETH to ZEC.
Oversupply of ZEC is coming. we
It would be nice to find a good alternative then.