[One With Air] does work however it makes you 5% faster after 10 seconds and 10% faster after 20 seconds which is pointless because [Zephyr’s Speed] already makes you 10% faster; so, unless you stay attuned to Air for 30+ seconds that trait does absolutely nothing.
No, thats not correct.
The 10% of Zephyr is permanent but One with air makes you faster up to 25%, so your’re on 25% after 30 seconds. Its working as described.