go through all your apps in link2sd and click create link and then link everything to your 2nd partition
you may have to uninstall a few apps first if it comes up not enough storage and then once you have linked your apps you can install them again
if you have already linked apps then you must have an app that uses a hell of a lot of data - you can see what app that could be if you arrange apps in order of data use and then clear data of that app (note any saved settings/progress and so on within the app will be lost)
The internal memory where user apps are installed is of /data partition.
So freeing up /system partiton is useless...instead u need to b concerned with freeing up /data partition(which is sufficiently free...I guess)
However, extra apps or scripts in /system partition CAN fill up RAM btw:sly:
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