Board Thread:Game Updates/@comment-1820055-20150808000124/@comment-25861293-20150810185756

Vcharng wrote:

I think we can conclude that gaining marks is related to actual contribution. So be careful if you sortie a bunch of rookies with an ace, the ace may end up getting all the credit, stopping those rookies from leveling up Reminds me of stories I heard about some of the great German aces; squadmades letting their ace get kills to boost their count and such, thereby decreasing the actual combat experience of the group as a whole.

Also, just so people are aware, planes can definitely go below the default marks. My Suisei (Egusa) dropped 3 ranks (to 0) in one sortie.