The desert pack - The Cauldron - has around 18 small scenarios, by which I mean under 5 days, with a low to medium unit count (let's say under 300, roughly...). Both HTTR and Valkyries also have a decent number of under 5 day scenarios with low to medium counts, though less then The Cauldron. My favourite pack, however, is Westwall with 9 scenarios in there at 5 days or under, with a medium unit count. But as ever, it depends which theatre interests you most. I'm not as interested in the desert as Europe, personally. Best to get them all, I think.