I know most of the mistweavers don't use this talent. I use it neither. However, I still made a macro to let it easier to use when need.
This macro should very suitable for FistWeaver and LightningWeaver, because most of the time their target is Boss.
The first time use this macro, Zen Sphere is cast on Target's target. Most of the time, it's MT. If no target available, it casts on yourself.
The second time use this macro, it casts on yourself.
At any time, this macro supports mouse over operation. So you can point to a member and cast Zen Sphere on him.
With this macro, you can always use Zen Sphere without worrying it re-cast on same people. And most of the Zen Sphere can explode on time.
Code:
/castsequence [@mouseover,help][@targettarget,help][]Zen Sphere, [@mouseover,help][@player]Zen Sphere