Currently I'm building a destroyer GWF and are lvl 55/56 so it is coming down to the last 5 points and I'm not sure which to take Disciple of War or Powerful Challenge. The extra 15% damage you get from marked targets is nice from when IB kills mobs and you get marketed targets or if you party with a GF. However the 25% permanent buff to Armor penetration that Disciple of War gives is very appealing as well which allows you to switch out some T2 end game gear.
So for the people that have done some further testing out or have this setup which is better usage of the points:
Disciple of War for the Grants you Armor Penetration equal to 25% of your recovery
or
Powerful Challenge for the additonal 15% damage to marked targets
I PVE a fair bit but would say once I get my full T2 I will be focusing more so on PVP. PVP was always the intention but I do enjoy PVE now and then if that makes any difference
At your level probably Disciple of War. Once you start getting T2 geared + enchants + Cat/Stone, then you can get your ArP high enough to drop it. On my GWF I have Powerful Challenge and it is a big damage boost. I often run with a GF, but even without one, I slot Daring Shout and works very well. If however you will focus on PvP then I would I would put the 5points somewhere else.
If you go off what everyone says about the importance of ArPen then DoW war is a must unless you have millions to spend on Dark enchants.
As for Powerful Challenge, I almost never run dungeons with a GF and it's the class I see the least in my party besides another GWF (I usually can tank just about any t2 on my Destroyer spec). IBS is just not reliable enough as it only marks targets after you get a killing blow with it, you would need to slot Daring Shout for sure or have a GF in your group.
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As for Powerful Challenge, I almost never run dungeons with a GF and it's the class I see the least in my party besides another GWF (I usually can tank just about any t2 on my Destroyer spec). IBS is just not reliable enough as it only marks targets after you get a killing blow with it, you would need to slot Daring Shout for sure or have a GF in your group.