That is impossible. You have a rank 12 cloak and are unable to full clear without any masks as a blood dk? Are you gripping one enemy and killing everything one by one? Are you putting points into your tree???
You can pull the left side up to the stairs for the corrupted area with 0 fear of dying and kill it relatively fast. All you need is crucible major so you can use it on priority targets. The cyclo trinket from mechagon will also help you with this. Enemies have reduced health for you, so killing the elites should be really fast.
Considering you are rank 12, I’m going to assume you have the titan talent which also makes the visions super easy.
You have so much self sustain and defensives, pulling big should not be a problem. I suggest you look at a run of a blood dk cause there is something really wrong here.