Switch, I'm still curious as to why you don't use DMC:V still. I find myself doing better DPS with that than Rune of Zeth or Necromantic Focus. The proc for DMC:V seems to have a higher uptime than Rune of Zeth (for me, anyways) and gives a little extra damage with it. Plus, I'd rather have the mastery than the crit. Maybe it's just my opinion, but I feel like I'm doing better DPS with the card.
Edit: Oh, I guess you do run ten mans, so you probably have to run more crit. Maybe that's why.
I've done a lot of Sims with the two and RoZ has simmed to be the better dps increase for me. Plus, it's also awesome how i can macro together the "On Use" effect with FFO. Since an FFO out usually dictates a mini-phase of higher damage, it works even better. And yes, the crit from RoZ is very useful, although my group has max raid buffs (aside from focus magic)
What about the trinket off Rag? Is this another situation where we need to use Rawr to determine which trinkets will be BiS for us? Or is there a set list for this?
Also, I had some issues with Rawr last night when trying to figure out reforging for the two upgrades I got last night. Since I am now at the shatter cap, it's devaluing crit so much it's telling me to reforge all of it off my gear. =/ And I think because of that, the gear suggestions are probably off too.