Yup. It has to do with GokuGohan2's playstyle, because 883 is fine for heroic, and of course also for Normal.
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GokuGohan2, your haste is a bit low for 883, do you wear a lot of crit items? To be honest I also don't like the chest. My first legendary was the bracers (awesome for prot), second one chest, third one boots which replaced my chest, and last week I got the absorb neck, which replaced my boots. Just a little background on my legendaries.
Now as for you, you really shouldn't have any problems with 883 in Nighthold Normal. There is a chance your healers are garbage though. Do you use Vengeance, and weave correctly? Can you keep track of your Ignore Pain absorb amount? Do you actively use cooldowns and do not wait until you're almost dead until you use a Shield Wall or Demoralizing Shout? (Last Stand is the best oh shit button in my opinion, but you also have to use that regularly on let's say Krosus and Augur)
Also, Krosus and Augur are in fact problematic because of all the magic damage. Slam damage also sucks, because it's unblockable, but the DoT is just nasty. Furthermore, did you know you can block the meteors on Augur? To be honest, it took me two weeks until I realized that. So, use your artifact and shield block for that meteor damage. Tichondrius though? It's one of the easier tank fights. I can't imagine what possibly inflicts so much damage that you have problems with damage taken there? If the adds live too long, and you get a new set of blood while you're still out there, it's a DPS problem.
Now, I know you have written that you know how to play the class, so please do not get my post wrong.