We just got our merge. Two of the servers had two groups with level 11. and rest were 8 or 9. As soon as merge was over, one of the group 11 just *ed in all the smaller groups. Since I was in the other level 11 group we somehow survived. They even tried to push us into their team to make it too biased. That particular group was able to pull this stunt before merge also as they had a powerful guy who was 10k above others.

This is just part of the game. When you become part of a too many active member group you are going to struggle to get gnw packs. Your convoys will be protected. but plunders will be hard to come by. You will win war but you might not get gnw packs. So its a tradeoff. The losing group's members might still prosper.