I tried this and there weren't any files in the 'Battle.....' folder. 

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Another way to get there is to open a finder window:

Click on the "Go" menu, while it is visible press and hold the "option" key.

This will add a selection about 1/2 way down called "Library"

Click on Library and it will take you to the Hidden Library folder that contains the path:

~\Application Support\ com.plarium.raidlegends\BattleJournals\