I'm no stam expert, but it is my understanding that you should hold off on using the monster sets until you get the perfect Maelstrom dual wield weapons, which are pretty much a requirement for BIS stam builds.
Personally, I think you are on the right path but might want to try 5x NMG, 4x Hundings, 3x Agility instead. Maybe have an extra piece of Hundings that you can swap out in case you are running with another stam player that has 5x NMG.
I would say to gold out the weapons, as that will boost your DPS significantly, even when you are in a transitional gearing stage.
What you have sounds pretty good!
But for more advice that could be useful, I would suggest checking @Alcast 's video on DD Stam DK for PVE, its really helpful.
https://www.youtube.com/watch?v=cCTgjvKSEaI
What do you think of dropping 1 piece off hundings (lose 688 crit) and add 1piece Kra'gh (gain 1867 physical penetration)?
With Crusher enchant on a dagger, sharpened on both daggers, major fracture and NMG proc that's about 14,360 physical penetration. Add one piece Kra'gh and that goes up to 16,277 penetration without cp bonuses. If a tank runs alkosh then that's about 28,267 penetration. Is losing roughly 2%-3% more crit worth the added Physical Penetration or do you think it's just overkill (referring to the 16,277 pen mark)?
What do you think of dropping 1 piece off hundings (lose 688 crit) and add 1piece Kra'gh (gain 1867 physical penetration)?
With Crusher enchant on a dagger, sharpened on both daggers, major fracture and NMG proc that's about 14,360 physical penetration. Add one piece Kra'gh and that goes up to 16,277 penetration without cp bonuses. If a tank runs alkosh then that's about 28,267 penetration. Is losing roughly 2%-3% more crit worth the added Physical Penetration or do you think it's just overkill (referring to the 16,277 pen mark)?
18-20k is about the max you want.