It's worth noting that even with up to date gear, pulling multiple packs in Bardam's is sometimes just not a good idea. Those mobs hit significantly harder than anything in previous dungeons and it can sometimes be tough on healers if they are below average. Since this thread is about WAR differences from the other 2 tanks, and since I haven't seen anyone explain it yet, this seems like a good time to talk about one minor difference between tank stances.

Defiance is slightly inferior to the other 2 tank stances due to a really strange mechanic:
Defiance - "Increases maximum HP by 25%, while reducing damage dealt by 20% and increasing enmity. Increases own HP recovery via healing magic by 20%."

Notice the wording there. It says healing "magic." This has some unfortunate implications. Healing magic DOES NOT include healing abilities, only healing spells. To put that in perspective, here are some healing abilities that are not affected by Defiance: Equilibirium, Lustrate, Tetragrammation, Excogitation, Essential Dignity, etc. At higher levels, a huge portion of healing comes from these skills. This definitely seems like it was a developer oversight. I mean even a WAR's own Equilibrium is not affected. This can lead to some feeling of squishiness for a WAR versus the other 2 tanks; however, it is not completely debilitating or anything. WAR is still considered an incredibly effective tank right now.