No Dark Side GL can efficiently counter a JMK/CAT/GK/GAS squad.

Sorry but you're incorrect. The LV vs JMK match needs understanding and cannot be done on auto, but it is 100% possible if you analyse the match up and realise exactly what make the JMK team so good and braindead to use. The standard LV team has all the tools needed to combat it.

And yes, opponents in my shard are very efficient on their modding.

Edit - I don't mean to come across as patronising or anything like that. If you would like to discuss how to do this, I'd be happy to help.