You can track the difficulty here
https://www.coinwarz.com/difficulty-charts/ethereum-difficulty-chart
But as Im sure you know, the payouts tend to vary. Last week I was receiving .1 BTC daily and now Im getting .095. It should have an average tho. Im always upgrading so I rarely see pullbacks
For your ETH mining contract, would you rather get paid 100% in ETH or 100% BTC or a combination?
100 % On all seperate contracts. I want BTC, ETH, DASH, & STEEM Mainly atm. But I dabble with others. I've bought and held most of the top 10
Nice.