Not necessarily a bug, but power level only gives Arcane Assault a bonus to penetration... which never gets applied because it does raw damage.

You should see a bonus to Accuracy from Wizard Power Level when the spell is cast. This would be visible if you hold down SHIFT while mousing over the relevant entry in the combat log. Also, Power Level DOES grant a bonus to the Raw Damage dealt, it's just not broken out properly in the UI. This is a bug that affects several of our abilities.

You should see a bonus to Accuracy from Wizard Power Level when the spell is cast. This would be visible if you hold down SHIFT while mousing over the relevant entry in the combat log. Also, Power Level DOES grant a bonus to the Raw Damage dealt, it's just not broken out properly in the UI. This is a bug that affects several of our abilities.

 

I have the same wonder about spell like fireballs and lightning bolt. Does this mean it's only the UI bug, but these are also affected by power level but just not shown when mousing over the damage?

Generally speaking, increased Power Level gives a spell more Accuracy, Penetration, and Damage/Healing (a small amount per Power Level). Additionally, we do some further scaling based on the type of spell it is. A spell will get additional scaling based on the following criteria (as soon as a spell matches one of the following criteria, it stops, so you don't get all of the following on any one spell):

• A spell with a projectile that bounces (Spreading Plague) will gain more bounces. Each PL is a fractional bounce, so it takes a couple of bonus Power Levels to see an additional Bounce.
• A spell with multiple projectiles will gain more projectiles. Each PL is a fractional additional projectile, so it takes a couple of bonus Power Levels to see an additional projectile.
• A spell that deals damage or applies effects with a duration will increase the damage/healing amount and duration of the applied effects.
• Anything that doesn't meet the above criteria gets bonus Accuracy.

Thanks for the explanation!!