All the testing was done with a Swampert that was slower than Xatu. Special Attack was 78 (Rash 12 IV)

Non-Torrent + Rain Dance Spam: 1:56
Non-Torrent X Spec + Rain Dance Spam: 1:35?
Torrent + Rain Dance Spam: 1:24?
Non-Torrent + Shock Wave: 1:31
Torrent + Shock Wave: 1:21?