From my point of understanding, the difficulty will only go up - and no way back. So the only thing that can rescue is a higher value of the product (Dash). Or maybe a new coin from Dash like you can see it on Bitcoin with Bitcoin Cash...
The stuff you wrote, is the problem everyone is currently having with D3 miner. 2 Units is really sweet - For me personal - I'll mine Dash and hold. Depending on your energy pirce, I would mine until you make loss, then stop. If you sell now the loss is save, if you mine you might have a bit of...