Re: Battle cry in pvp
All -enemy effects act just like +friendly in that Weaken reducing a third of damage uses base damage, therefore it's the same as -33%Dam - virtually nothing to a character actually dueling with physical attacks. Battle Cry would be the same way, with both damage and defense. You'd have to find a character who had moderate defense and damage for it to be worth much, and then you'd probably be best served by outright killing them, just like other characters.
Now, team dueling is different, since every little bit matters to keep the odds - and team numbers - even or in your favor, but with up to four people attacking at once... What chance do you have of getting more than one, the one you're tracking, cursed? I've always said a pure Whirlwind build might be best benefitted by taking 19SPts out of Battle Command and putting them in Battle Cry, but I'm guessing tertiary masteries (Natural Resistance and such) to be a better fit if you get that high. War Cry duelers wouldn't really have much choice, since Howl and Taunt can only effect non-bosses, but even if Taunt's -%Dam and -%AR was useful while not coaxing characters toward you, they probably would have just as much +%AR as +%Dam and +%ED and would have little effect.
