Thanks for the spreadsheet breakdown. Profitability is really hard to rip into unless you have a few top tier graphics cards, or get lucky with an alt coin skyrocketing.
That being said, I'm surprised that switching between Nicehash and a specific coin kills ROI. Makes sense, but hadn't thought of that.
Has a lot to do with the rapid fluctuation in prices of Monero and BTC in my case, and that it's hard to convert without having a certain amount of XMR, making me mine a less profitable coin for longer than I wanted so I didn't have a small amount trapped in XMR