Bard - Foe Requiem Song - any recent changes?

[RyuDragnier]

So the question I have is when do we use it? With a long cast time, and toxic mana drain, do we need to precast then drop then recast and drop when someone in the group is going to use abilities this will enhance? If I leave it on for any duration of time, my mana goes kaboom, and I have nothing left for more of this or for ballad. Just curious.

4 man groups, it's not worth using at all since at most you'll have 1 magic DPS class. 8 mans, it depends on the party make-up. If you have at least 2 DPS mages, it's worth casting, but even then it depends on the fight.