I am guessing you are mining at Nicehash.
You can goto whattomine.com to see the difference in profitability between mining direct and Nicehash marketplace.
With ETH price so high now, that difference is huge almost 15-20%.
My ETH farm mines to ethpool and dwarfpool, and collecting ETH coins back to Coinbase.
Compared this to ZEC mining, I prefer Nicehash because you get paid in BTC upfront without the coin confirmation BS -- I also find the ZEC pools too sluggish and struggles whenever diff level goes up.
I just did what you said and blake is still coming out as the more profitable coin right now for my 1080ti's.... ive been getting between 10-17/day per card for almost a week now.. im not sure how long it will stay like this.. but its been super profitable since skein took a nose dive last week....
Im mining blake on zpool... the 24hrs profit number currently is 0.38722 (which is low today)
0.38722 x 91.494Gh/s=35.42830668mBTC/day or 0.03542831 btc/day, today is not a good day for me to mine blake, because it was around 0.8ish the last week nearly... if i mined blake today i would only make $6.86 per card for the day if the profit rate stayed stable....which it never does.. right now im mining skein....
skein currently for me is 0.00393, so 0.00393 x 22503 hashrate gives 88.43679mBTC/day or 0.08843679btc *estimate today or $222.88, basically $17 per card for me today... but since i know skein moves a lot during the day... i expect around 13-14 per card
AND dont forget the pool fee, so whatever it comes out above you times it by 0.98 to get your closer estimate earnings to subtract the 2% fee