Skill Reveal: Siphoning Trap

On Reddit, someone mentioned the sound is under changes currently.

Couple of questions.

How far does it reach the beam to heal me, and how can we increase it?
As people are saying, they are worried there won't be any use from this. Any way to add 50% of heal to trap-layer is ALSO added to all party members, including summons/totems. This may make this jewel far more interesting and also truly seen as "support." Or perhaps it can link to the two closest allies etc.