I'm using 1150 Cclock and 2200 Mclock for weeks already and I'm getting 30.32MH on the rx580 with Micron memory, pretty stable, also I use AMD wattman to underclock the voltage for the memory to 860mV, power draw is 83 watt max, you have no problem
Tried this setting today and miner restarts every two hours, I don't know how this is stable for you and I'm also using a RX580 with Micron memory, OC'ed MSI version, what works best for me is 2150 Memory clock and 1150 Cclock, still this doesn't push the hashrate to 30mh, I'm somewhere between 29.55MH to 29.89MH