There's not a lot of decent tanky cloaks out there and I would deff go for that first then belt then tier stuff when u have the frosties ready.
There are plenty of trinkies available that are good and black heart is one of the best IMO. I do have the key but did buy it after the other items I mentioned.
The 6k absorb isn't a lot really, stam is nice but with 188.8.131.52.3.3.3 we get 3% more from vitality so you should have seen a small increase already.
So long and thanks for all this fish