Sometimes in arc staff, when I hit enemies in pvp, the hit sound and effect triggers but the enemy is not phased or damaged.
Here are a few examples:
https://youtu.be/ihKcpelE-JA
https://youtu.be/5kHre5t-GA0
https://youtu.be/hQAjiBH99F4
https://youtu.be/riDiINkxr2w
https://youtu.be/xCJx63hJJzQ
It is also too slow..other classes can get away with ease after go fast update.