Hi
It's a great extension, I am using your extensions formy site. If you provide two caching option that will be great for large web site. One cache will be for all desktop and another will be for all mobile device. You can also add one extra option for this feature.
Regards
Jamal uddin
Joomla version : 3.4
JotCache version : 5.3
site template: own
system plugins : jch_optoimize