Oh was this a recent change? For some reason I seem to recall seeing a rorg with crit chance and cooldown reduction (maybe just in my dreams). So a 'top tier' RORG would be max main stat max att speed and life on hit rerolled to a socket or crit?
The ideal is max MS, max IAS, LOH and the last stat being either a socket, CHD, CHC or CDR. Then reroll LOH to another one of those four. The socket is pretty much mandatory, but which other stat you prefer to take depends on what you need at the moment. Most classes have high-end builds that call for high CDR these days, so if you are going for one of those and you can get 7-8% CDR, take it. Otherwise, look for 6% CHC or 45%+ CHD.