Hey there!
Just wanted to hop in and clarify some things, the scenario you outlined carries some common misconceptions about how anti-leeching functions.
I've noticed a lot of mis-information on this. The only thing that matters is a specific player's overall score, combat score is not weighted any greater or less than building and utility score. Additionally, even if one player significantly outperforms the rest of the team in overall score, but everyone else still participated and has similar scores relative to each other, all players will receive all mission rewards with no penalty.