I'm not sure if 2200Mhz makes difference compare to 2100 for this performance timmings...
I would prefer lower it'll be more stable and also less heat...
When I lower memory clock from 2200MHz to 2100MHz I am getting 29.6 Mh/s, so difference is 1.4 Mh/s, and temeperature went from 65°C to 63°C