Dual path would bump it up to technically 12 houses. Even those in the past (aka 90s), like Frightanic, counted as "two" since they were different experiences.
But realistically, I don't see that attempt being made due to the fact the crowds are too big & having guests choose will only increase the waittime for it (unless it was two separate lines in an already congested queue mess). So probably shouldn't get your hopes up on that being a thing.