PDR Ignore questions

Posted this on sw.net too, but I feel like I would get more accurate answers here.

Few questions;

1. Does the %PDR Ignore from the Codex work?

2. How exactly do %PDR Ignore stats stack?
Someone told me they add up (ie, 30% weapon + 30% codex = 60% ignore), and I read somewhere before they multiply (ie, 30% weapon applied first, then 30% codex on the remaining 70%).
Any clarification on which is correct?

3. And if they do stack additively... What happens if you pass 100% PDR ignore?
Heroes get 40% PDR from their skill, Combat Mastery, so if you were to stack it carefully you could potentially get 110% PDR ignore (with ambition %PDR Ignore, if that works), if not more thanks to Combat Orders. What would happen?
Would it just be a straight up +10% damage? Or would it just not do anything past 100%?

Not sure if I should bother to keep going on my Ambition or just go do something else with the 20 minutes I spend per day on that..

1: From what i can read, it doesn't work
2: So far everything from potential is additive, so i'll have to say additive.
3: It'll cap at 100% like crit does, that's my guess atleast.

This is just replying with what i've seen others say on the forum, i could've misunderstood it.

Unleashing covered it all.

Thanks for the help.
Guess I won't proactively chase that level 100 ambition then, it's probably easier to just recube for 30% Ignore.

1: From what i can read, it doesn't work
2: So far everything from potential is additive, so i'll have to say additive.
3: It'll cap at 100% like crit does, that's my guess atleast.

This is just replying with what i've seen others say on the forum, i could've misunderstood it.

Doesn't Crit max at around 96-98?

Doesn't Crit max at around 96-98?

http://www.southperry.net/showthread.php?t=48793
Nope.

Doesn't Crit max at around 96-98?

Nope.