Originally Posted by
eschatological
Barrage will be better for sustained AoE, but outside of challenge modes and specific bosses (Wind Lord comes to mind), Glaive Toss is better. GT is better for single target as well.
Single target is better to talent for, but there are a few fights with AOE that you might consider ToTH for:
N/H Stone Guards
H Feng
maaaaaaybe N/H Elegon if your group has troubles with the adds in the transition.
N/H Will
maaaaybe N/H Garalon if you're cleaving off legs onto the boss, but you should probably be on the boss.
N/H Wind Lord
N/H Ambershaper if you're assigned to oozes
N/H Empress, very useful
N/H Tsulong
H Sha.
That's 8 bosses, maybe 10, out of 16. Everything else, BM is better for, and I'd argue DB (single target talent) may be better on some of these fights where the AoE is short and bursty and you don't necessarily need 15 seconds of MS spam. The only places I'd say it's mandatory is H Feng for adds, and Wind Lord. And Ambershaper if you're on adds, but you probably shouldn't be. Oh, and it's very helpful on Empress too.