Not sure who updated the ComposureOTHER set of the guide, but Vitiation tabard +3 gives about 15 seconds duration fewer on Haste II than Lethargy Sayon+1 due to how the bonuses are multiplied (confirmed via stopwatch testing).
ItemSet 359616
Also, since none of our buffs on other people actually scale with Enhancing skill (aside from Phalanx II up to 500), there's no point in wearing gear for it over Fast Cast for better recasts. Furthermore, Duration sets should include Colada as it can be augmented with Enhancing magic duration+4.
So my proposed BiS set for ComposureOTHER for Haste II/Flurry II/Storm would be this:
ItemSet 353581
For ComposureOTHER Refresh:
ItemSet 360510
For ComposureOTHER Phalanx II (cape requires a +6-10 skill augment to cap):
ItemSet 360514
This one for Enhancing Duration on Self and Protect/Shell on others:
ItemSet 353580
Assuming master+merits, the above set has easily more than the 500 skill required to cap Gain-spells and Barspells especially if you swap out pieces for potency+ as both have skill+ on them (Viti. Gloves +2/+3 and Shedir Seraweels). And Temper II/Phalanx use their respective full sets for potency over duration.
Lastly, for Refresh on Self:
ItemSet 353591
Inspirited Boots and Grapevine Cape are considerably worse for duration than our alternatives.