I just came across this thread while researching Smoke Scream and I, too, am always on the lookout for dips with strong, thick scapes. Here are a couple I can add to the strong dips list:
*Jungle Beauty* (extremely strong scapes for a dip, high bud and branch count)
*Titan of Ice* (incredibly strong scapes for a dip... But also has huge blooms with very thick substance, so if you're in a high wind area, those thick scapes and petals could catch the wind, and crack at the weakest point, which is likely the crown. That happened to me last year when my plant was brand new and not well-established in my garden yet. For what it's worth, I staked it and it bloomed out fine the remainder of the season, but a month or two later succumbed to rot, likely from the crack at the crown combined with poorly-draining clay soil.)
