You had +6 defensive kills, but that is not actual points. They had +4 Attack bonus, which means that 10 (or 10 more than you side did) of their KO's were on nodes where they already used up the max KO for points (ie, took them more than 3 attempts). So for sake of simplicity, say one of your bosses had 13 kills, and no other node on either side had more that 3 on any given node.
Just happens that the 10 difference would seem like it would be the 2 missing people, but that is just coincidence. As others said, you would have gotten full 30 Attack bonus for those 10 extra empty nodes, just as you get full bonus on any “potential hero” node like the normally 5 empty spots per map.
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so it benefited u...
they missing 2 people so that = 10 defenders, and u got full attack bonus from the start.
Just happens that the 10 difference would seem like it would be the 2 missing people, but that is just coincidence. As others said, you would have gotten full 30 Attack bonus for those 10 extra empty nodes, just as you get full bonus on any “potential hero” node like the normally 5 empty spots per map.