Originally Posted by
chesder
The proc rate is very low and the ability it's latched onto is one that, in most cases, would only cast every 6 or 7 seconds at most. Those two things compiled together make it a low uptime.
The Elemental ones are based on spells that are also barely cast, but the proc rates are much higher leading to the uptime you see.
All in all the Enhance version of this legendary is by far one of the worst added since Ascendance on it's own for the spec is borderline useless. Unlike Ele, which opens up Lava Burst for spam, Enhance just gains a slight damage buff to Stormstrike and a cost reduction.