Re: Claymore's Dual Ethereum AMD+NVIDIA GPU Miner v14.1 (Windows/Linux)
At my point of view, dual is not profitable, or the same as mono, except free socket. In my case mono mode takes apr. 800w for 6 cards RX480 and dual mode takes apr. 1050w.
you are mining the wrong dual than 
do you have tried ZIL in "custom" dual?
give a try and you'll see the positive results
For long time it's not profitable for me either.
You are mining for a ~minute every 2 and a half hours, approx
What are you really losing here? I don't get it?
I mined ZIL till difficulty was OK. Now the PoW difficulty is damn high. This is one pool's quote: "Please note: At the current difficulty to find a valid share you need around 5 GH/s. So if you mine with 500 MH/s, excluding luck, you need 10 rounds to see earning" (see original at https://zilliqaminer.com/#start_mining)
depends on how many Mhs of mining speed do you have, but, even small/old rigs can get some ZILs, based on a month