If we're talking a single element, the Wave Turn wins for me. Such a unique and fun element. The stall is a very close 2nd place. The best SERIES of elements, Rod's quad down. <3
Hold on a sec, how are we defining a single element?
Is a double-down not a "single element", and therefore by extension why not the quad-down?
If the quad-down on Lightning Rod doesn't count, then I think I'd probably go for one of the following:
-Storm Chaser's first hill: I can't really recall every feels consistent ejector airtime like that hill. Some hills might have slightly more intense airtime, but I don't feel like they're ever quite as consistent as that hill feels. Skyrush is probably the only think close, but I did feel like the airtime spiked at the entrance or exit of the hill (depending on your seat). Storm Chaser was just ideal.
-Outlaw Run's 153° hill: I think part of the reason why I love this element is that it felt like RMC's first real, no-holds-barred coaster. It was the first time we really saw the potential in the company (NTG is good, but none of it is quite as crazy). Plus is rides beautifully.
-Iron Rattler's final hill: I'm not a big fan of the meandering bits along the cliff-tops on this coaster, but that final hill into the corner and into the tunnel is just absurd.