*Killing the boss will bring down map meter 25%. You need to defeat the boss 4 times, and she will turn into a stronger form in the last battle. Map meter does not regenerate.
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*Considering the difficulty of the map compared to others, this is a very good map to train on if you are bored with 3-2. Bar Node G, you can intentionally send fleets to get you to node J and generally defeat easy fleet comps. This is not resource or repair friendly though (since you will get damaged one way or another).