Arcane was already the worst spec of the 3 by far. Why would you nerf it even more?
Arcane Barrage Launches bolts of arcane energy at the enemy target, causing (1,648 + 123.5% of SP) Arcane damage. 1,590 + 119.2% of SP) Arcane damage.
Arcane Blast Blasts the target with energy, dealing (728 + 104.5% of SP) Arcane damage. 702 + 100.8% of SP) Arcane damage.
Arcane Missiles Launches five waves of Arcane Missiles at the enemy over 2 sec, causing (392 + 29.5% 379 + 28.5% of SP) Arcane damage per wave.