Hi,
Arcing Slice is subpar compared to all the other burst abilities. So nobody ever uses it. Warriors have way better options to maintain a high fury uptime and the damage of Arcing Slice is too low for a burst skill with a fairly long animation time of 3/4s.
My suggestion for a skill revamp:
Arcing Slice (3/4s casttime, 10s cooldown)
Burst. Deliver an uppercut that does extra damage against injured foes.
Damage: 1,046
Damage against foes under 50% health:
Level 1 Adrenaline: 1,305
Level 2 Adrenaline: 1,745
Level 3 Adrenaline: 2,094
Range: 150