Armor penetration confusion...

Alright so I have a few questions regarding armor penetration, so here goes.

I here there is a maximum 'bonus' armor penetration that can be applied (20%), however I don't really know what counts as bonus and what does not. Suppose I use a hornbow (10%) along with a sundering bowstring (20%) and the rit skill sundering weapon (10%)... So, what stacks what doesn't? Will I have 'wasted' armor penetration?

I actually have another relevant question... is there a cap to how high in any attribute you can get? If my marks is 16, I use experts dexterity, and hit the +1 (20%) will it all stack and affect skills, damage, and crits properly?

Any help would be much appreciated.

http://guildwars.wikia.com/wiki/Armor_penetration <-- Should answer your questions about AP. (Someone actually asked the same question you did on the talk page.) =P

Yes.

Thanks a bunch! I don't know how I didn't think to just wiki it, but anyway its all good now.

Quote: "DISCLAIMER: The information in this article is based on experimental research conducted by the community, and may contain inaccuracies and speculation. While we strive for accuracy in these articles, we make no claims of experimental rigor or unbiased conclusions. Caveat lector. "

And? The wiki page is correct. Unless you want to point out a specific inaccuracy, quoting that warning is useless. The talk page however has misinformation; since when does AP stack multiplicatively?

I think the max you can have in an attribute is 20 (with god blessings eggs, candy and stuff)I have not been able to get it more then that. I don't know if a +1(20%) will push it over.

Well it should...I will try it tonight on the dummies where you get the z-chest

the 10% AP from hornbow is applied on every hit. the 20%/20% AP from the mod is applied 20% of the time. so on a hornbow, your AP varies between 10% to 30%. at least, i believe that's how it works.

Would the 10% from [Sundering Weapon] stack with the 30% above? For a total of 40%? It's low chance to get the 20%/20% percent bonus during the 3 hits from [sundering weapon] but it should be possible, and according to the wiki, they should stack, as only one is non-Bonus AP.

Sundering Weapon (the skill) is base AP, so it won't stack with the AP from a hornbow.

On the contrary:

"Bonus AP does stack with base AP and other sources of bonus AP."

Sindering Weapon (Skill) is Base AP, Sunder mod and Hornbow are both Bonus AP, which means 20% of the time you can achieve 40% armor penetration.

That being said, the best armor penetration would probably be achieved by a Warrior with 16 Str (16%) using a Hornbow (10%) of Sundering (20%) enchanted with Judges insight (20%), and the Warrior's Might blessing (10%). This gives a total of 76%, which is bragable.

There might even be more bonus skills of which I am not aware.

My bad, I keep thinking hornbows are base AP, even though people keep correcting me :/

Highest AP would be Penetrating/Sundering Attack + hornbow + sundering mod + Judge's Insight + the shrine blessing. That'd be 80% if sundering triggered.

Penetrating/Sundering Attack are only worth 10%. Strength is the best base you can get while using a bow.

You can use penetrating Chop (20%), but you lose the 10% for hornbow. You could use holiday items and/or consumables to boost your strength and get an extra point or two.