Executioner's does exactly twice the extra damage as Penetrating, but Penetrating has 20% armor piercing and a lower adredaline cost. Hmmm, lets look at this most closely (we'll use 12 axe mastery)
At 12 axe, Executioner's does 36 extra damage at a cost of 8 adrenaline.
At 12 axe, Penetrating does 18 extra damage and has 20% armor piercing at a cost of 5 adrenaline.
Another thing to consider is this: For strength Warriors, using an axe attack skill with a higher frequency of use makes better use of their extra armor piercing, because it gets used more often that way.
So a better example of strength warriors would be this (we'll use 10 strength to make it easy):
At 12 axe and 10 strength, Executioner's does 36 extra damage and has 10% armor piercing at a cost of 8 adrenaline.
At 12 axe and 10 stength, Penetrating does 18 extra damage and has 30% armor piercing at a cost of 5 adrenaline.
After 16 strikes of adrenaline, Executioner's does 72 extra damage and pierces 10% armor two times.
After 16 strikes of adrenaline, Penetrating does 54 extra damage and pierces 30% armor three times.
^^^ You guys see where I'm going with this.
For strength Warriors fighting high AL monsters, Penetrating would appear to be better than Executioner's.
Feel free to discuss.
