My question is, what is the reasoning behind using twister, is there a large advantage over using something like piercing orb? Is it an AP sink? If so, what is the advantage over using the Arcane Orb that pierces.
Now that I've spent an absurdly long time playing wizard, I can answer this with some confidence.
Energy Twister, specifically the Wicked Wind rune, has several major advantages over Arcane Orb (whatever rune).
- It does a lot of micro ticks while staying in place during its entire duration, this allows you to have multiple chances of proccing an 'on crit hit' effect such as gaining Arcane Power or triggering Critical Mass
- It can hit targets multiple times because it stays in place
- It scales well with higher attack speeds
- It can stack in the same location by casting it multiple times
This is most commonly used in CM Wizard builds as they rely on many proc effects.
Arcane Orb will only hit a target once, so your chances of proccing an effect is much smaller.