Here's what I came up with, a pretty functional approach:
(fn [l]
(let [lt (partial apply <)
pairs (->> (map vector l (rest l))
(partition-by lt)
(filter (comp lt first)))
max-count (apply max 0 (map count pairs))]
(->> pairs
(filter (comp (partial = max-count) count))
(first)
(#(if %
(conj (vec (map first %)) (last (last %)))
[])))))
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