I love it that people blame anyone but blizz for the situation. The skills are balanced almost as much as OG vanilla because "hurr durr we will keep it secret, even though we don't have internal QA team that can handle it"
I think it should be split by time frame. One build for the whole game isn't the way to go.I feel like Mana Sphere is probably the best ability for the first few minutes of the game (until you get to level 7 or so and the mob dense areas have dried up)But it's almost impossible to hit a skilled player with when you're down to 10 people in a small area. So transition away to Fire Whirl/Rime Arrow or something for the end. And Rime Arrow is near useless at the start of the game, since it's the only thing that doesn't do aoe/cleave damage. But once the mobs have dried up and you're fighting more players, it's valuable again.