ToC HC - Bloodtank need advice on warrior+rogue encounter
This is my first post here, and if an identical one already excists, I apologize.
I've been tanking heroics for quite some time on my DK (blood). Most of the time, I do them with a RL friend (armory). At this point I find that all 5-man heroics are very easy, and usually clear them fast with nobody dying. Except for one...ToC. Most setups are ok, but when I get warrior+rogue, I usually get butchered - fast. Actually, the only times I've cleared ToC is when my friend have been healing. Any time I get a PuG, we can't get past the warrior+rogue setup. Now, I refuse to believe that my friend is the only competent healer on my server, so I must look at what I am doing wrong.
I have tried alternating between who is the first kill, but it doesn't seem to make much of a difference wether the group kills rogue or warrior first. After 15-20 seconds, my HP plummits and the healer can't get it back up fast enough.
My rotation is DnD-IT-PS-PE-BB for initial aggro. Then I spam DS and HS as long as diseases are up, refreshing with IT-PS when needed. I try to use defensive coolwdowns when available, but yet I keep dying.
My expertise is very low atm, so I was considering to replace some +stam gems with expertise to reduce boss parrys, which I suspect is one reason for me dying so fast, except for the MS debuff. Here is what I think could improve the situation:
-Get 26 expertise, at the expense of some stamina-gems. Is 30K unbuffed good enough? I'm at 32K atm in frost presence
-Improve rotation to maximise the use of defensive cooldowns
-Gem for more avoidance, after 26 exp. Dodge or Parry?
I would really appreciate some advice. Yesterday I was kicked from a ToC PuG for the first time and I don't want that to happend again.