doesent that one also require you to switch to barrage for bosses? i did see a build that used tornado shot / barrage but maybe yours is different.
Yes, but I think TS is a happy medium. Between Split arrow for clear & barrage for single target. You can run TS for both, not as great as either for what they do but can be aoe & clear fairly well.
Hopefully in the new routine there is a skill selection for unique mobs, as well as an option to cast totem for unique mobs. Most builds if you get enough dps don't need an aoe/single target until map bosses or a few hard rares.
To help with these hard rares I often get a % knock back on jewls, just to keep them off of me.