Originally Posted by
Syonide
Yes, Greatness over GT is a great choice at your level of passive ArP. As long as you have Wrathstone, you may look into dropping Victor's Call, and gemming a little expertise to make up for it, but it honestly probably wouldn't be that much of a dps increase, and it would cost you another 3 epic red gems, so it might be a little expensive for such a minor increase.
The other thing I wanted to mention is just to make sure you pop your Victors Call during Death Wish, and always pop it before you have a WW. WW counts as 2 hits and will proc 2 stacks off one GCD, gets you a tiny bit extra use out of it, but every bit will help. You would also do well to pop your Victors Call and Death Wish within 4-6 seconds of a fight starting, assuming your tank has the threat for it. At the very beginning of a fight, both your zerkings are going to proc, and so is your greatness card. Coupled w/ VC and DW you can put out some ridiculous burst damage, and generally speaking most guilds don't pop BL/Heroism until 2 minutes into the fight anyways, so they will be up again later.