To do - Time Inputs on both

Swords Dance
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Travel to Dragon - 36.65
Teach - 5.28
Teach CC Later - 6.84
Animation - 35.5 (5 Swords Dance) 42.6 (6 Swords Dance)
Poppy /w SD - 2:21.59
(Total)
3:39.02 for 5 Swords Dance
3:46.12 for 6 Swords Dance

X-Attack
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Travel to Dragon - 29.04
Animation - 52.35 per X-Attack (5 Times) 62.82 (6 Times)
Shopping Inputs - 1.75
Poppy w/o SD - 2:19.37
(Total)
3:42.51 for 5 X-Attacks
3:52.98 for 6 X-Attacks

(X-Attacks lose out by about)
3.49 seconds if you need to setup with 5 of them
6.86 seconds if you need to setup with 6 of them
Low Kick on Bronzong likely makes X-Attacks faster.