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)
Any way, for AMD I used https://github.com/DanSoQt/ZilSwitcher, but now stopped.