The best answer is to go to www.whattomine.com and explore their bajillion profit calculators. Their front page even has a setup with GTX 1070s, so just choose 2 1070s and it will calculate an approximation of what the most profitable coin today is. If you know your exact hashrate then you can manually adjust that to be even more accurate.
Yes, I always take a look to that web, but in many cases the "Profitable" coins are fluctuating over the day several times... so I cant decide Which coin to mine.
That is the reason why I mine over zpool
