If the network hashrate isn’t 100 times what’s currently on the test net a month from now, I’ll be amazed.
People mining with 1 H/s might not ever even make the payment threshold of some pools. 
Is there documentation for what the difficulty parameter maps to? Is there a calculator that converts difficulty to network sol/rate and then ZEC mining distribution per sol (accounting for the slow start ideally?)
How much H/s of a RX 580 8gb run for mining zcash?
Really? You dug up a 9 month old thread to ask that? There’s information all over these forums and on the Internet. Please check the date before responding to a thread.