For New Beginnners 6 days is good enough to learn the map to lear your roll in a alliance if so chosen ...6 days gives u a small window to make a city defense..People who need 6 days are people who never played this game or many games like it so advice to them some support is likely to be a game changer and be either more Fun and they progress or they hate it and run away..Me personally 6 days is a perfect shield
6 days is needed for new players to learn the game - especially for people like me that had never played a game like this before. I'm still learning after a month, so I like the 6 days option so you don't end up getting knocked down as soon as you start learning.
I guess six days is gonna win. I think that's a lot for a 3x world but, hey, doesn't matter that much.
With 6 days on a 3x world you're definitely running the chance of people reaching conquest before BP is out lol