You might try asking in the DK PvP thread in the PvP forum.
Originally Posted by Vignarg
D&D, Howling Blast, Blood Boil, Pestilence, and Heart Strike would all ruin CC. To the best of my knowledge, unless it explictly states otherwise in the tooltip (i.e. Wandering plague), they would hit CCed targets.
The rotation you listed seems to have an extra blood rune left over. PS>IT>SS>BS>BS>UB>DC would use it. Also, the rotation would depend on single target vs aoe.
SS renewing Diseases would dictate next rotation
The secon rotation is hard to say because you know have a Death Rune (from Pest) and a Blood Rune from D&D. This won't be back on track until another rotation. You could just drop out another BB, or you could grab Frenzy and use the DR there.
I think the bigger concern is 1/3 Morbidity on a build bragging about how well DC scales. Also, I'd be concerned about using D&D without Subversion. At any rate, I would ignore the "avoid ArP" on anything that uses so many physical attacks. Would it rely on ArP as much as, say, Blood? No, but ArP would still be welcome on all that BS/PS/SS you're delivering (and for BCB unless I'm mistaken).
Extremely new to DK so bear with me here. I've seen a lot of rotations posted, but my primary focus is pvp with my DK. As an Unholy (0/19/52) PvP/Arena DK is the above rotation against a single target still considered the best?
I understand that there are a lot of intagebles to take into account in PVP, but I'm looking for a straight up good rotation to learn and then improvise from there.