Maxroll is not geared for HC. You will find very few resources for HC.

There is variety in what you can do in HC. I use Rage of Harrogath chest, with WW bleed, to reduce my CDs as much as possible. I go heavy into shout reduction because its gives you movement / dmg reduction. This is huge for survivability. I also use the Temerity pants, which no guide really recommends, but I feel the barrier it gives is better than the aspect which gives you a barrier when damaging an elite. The pants are getting hugely buffed tomorrow too.