I've seen some houses in my neighborhood with a very high peak pyramid style roof. One in particular I'm thinking of has what looks to me to be less than a 10 foot top ridge. He has a ridge vent up there, and none down the side. I haven't looked at the back of his house to see if there are any other vents, but at least from the front side, I don't see any other vents and none down the sides. I'm not sure what the right solution would be for that owner.