Use Path of Blossoms when you're waiting for a boss to become active who is currently untargetable. Provided your tank is pulling right away... You could use it on Vizier Heroic during the countown since you know where he's going to land. That's about it.
both the skills have their uses, path of blossoms for example I'm using when I'm fc:ing and planting them nearby to rid stealthers of their stealth + instantly tagging about to spawn mobs, etc, jade lightning you use for your ranged attacks whenever you need to.