What you want is a 24hour SEA.
Pretty much Larry, thanks for "getting it", but instead of 24hr, maybe a couple of missions run in the morning, a couple in the afternoon and a few in the evening.
There would have to be some automation involved so all day staffing wouldn't be required.
AI might have a place in this idea if only to fill unclaimed slots, so the missions could continue with low player numbers.
So Anaxogoras has a point, there might be some Combat Tour elements that could be used.
This started as a wishlist idea and then some suggestions were made that AVA might be the place for it.
Certainly not, if AVA was to continue to exist in it's present form.
Even though I've never had a chance to try AVA, I'd hate to see it die out completely.
I realize this would require some programming effort to bring about even if it was ever considered, but for reasons I noted in the wishlist forum it seems like it might not be so far-fetched.
I do appreciate the feed back.