Probably my viewpoint is not best at this, I don't even have "giearescuoore" addon and I join the pugs just for lols.
All I know for sure is
Carrying healers or whatever, that is very situational, you shouldn't base you gear or play around that. New DK tanks have to learn to recognize moments where they should self heal, where they shouldn't, when to use or not to use CD's. If you have gear and skills to adapt to such "bad healer" situation, that is very good, but new tanks should learn first things first - that is be a tank and let healers do their part.
It should look like this:
"oh, I will use vamp blood plus DS right after this "Breath" and heals will top me quick, Will reset stacks with AMS, next breath I will blood tap+rune tap+DS, and for next breath I will icebound because my stacks will be high by then, I still have trinket and AMS will be off CD when next thing comes" and so on and on, to create circle of CD's, DS using only when you NEED, not because you can, putting healers to sleep is never a good thing... damn if I could just self heal and not worry about threat, damn, I wouldn't even need healer on most bosses.
I don't know, just my thought on tanking... don't invest time and effort in unnecessary things.