I recently tried to play Arkham with Dunwich and the Lurker, and I chose 6 investigators. I guess that was a mistake.
I tried the game with three different GOOs (Abhoth, Nyarlathothep and finally Azathoth), and I never even got started. I tried to close a gate or two, and everytime when I was ready to seal three or four gates, the sixth one opened (in one case, the sixth and seventh at the same time). Is it possible in this combination to keep the GOO from waking because of too many gates and what did I do wrong? I couldn't enter every gate at once because not very investigator can defeat the monsters sitting on them, and taking even two rounds to collect clues seemed to be too much.
Is there a chance of sealing such a game? I ask this question because my group and I have logged - in different combinations - about 60+ games of Arkham since the spring and we usually manage a seal. But we usually play with four investigators, so maybe I need a different kind of tactics. Though I fail to see how that one gate earlier can make such a difference, but I don't know.
Ideas, anyone? Thank you very much.

