Prefer non node paths, If you are so busy. As a group, play systematically and use energies wisely. There is a system who uses energy first, second, third etc. Map 5, map 6 can be finished easyly 5-6 hours before it ends. I havent experienced map 7 yet but I am sure It can be played same.
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If your alliance mates can't understand you have real world responsibilities, find a new one.
Your family and career should never take backseat to a game.