Death's Daughter is the best. Raise Morale is near useless since you're not going to want to use your R to speed yourselves up as much as you're going to drop it where your opponents are running to to either cut them off or slow their movement, something Death's Daughter REALLY does well since there's a giant nuke in the middle. Fire At Will is pretty good as it does give some good damage if your team can get the enemies to stand in it long enough for it to actually do the extra damage, but you're better off with Death's Daughter since it drops a nuke that people will WANT to AVOID since it does around 200ish in true damage, which is a good chunk of damage at any point of the game.
Overall, it isn't all tooooo interesting as a whole. We were hoping for more oranges and ended up with a boost to an ult that was and still is used for free assists and a large area slow... and to kill that one guy who sits under his turret when low on health and going B with his shop open and not paying anything to the Death's Daughter about to hit him in the face.