Is Bioluminescent Orb for niche situations only? Is it worth buying?

[Solist]

Ragefire bp does the same job outdoors for tanks.

It's handy to break mez's on a monk with a blind cast or two.

It's handy for about 4 pull situations in the game, like blind/flopping out korokust room mobs solo, dok king room royal guards, blinding vilefang out. Dumb stuff like blinding the mobs from platehouse out to split them.

I could be 100% effective without it.