Hey There,
Before some other DK-overlord beats me up for saying this.
If memory serves correctly playing with Castigator is still preferred, you should also be aiming for Str > Crit => Haste > Mastery > Vers as your preferred stats.
What makes the bracers amazing is the chance to pop 8 wounds at the same time, which is basically a free Apocalypse cast without the Ghouls.
I believe rotation should work similar to the one on icy-veins and wowhead:
1) Apply disease via outbreak
2) Transform on CD
3) SR if you have >3 wounds on target and can burst them.
5) Burst Wounds as much as possible with SS
6) If you have >5 wounds use SS
7) If you have <5 Wounds use FeS
8) If you have nothing to do fish for SoW/RC buffs with DC
Obviously you want to pair your Gargoyle with your opener or when you feel you will do the most damage.
Talent build should be the following if you are focusing crit:
1) Bursting Sores (amazing ST & AoE burst with crit build and legendary)
2) Pestilent Postules
3) Castigator
4) Sludge Belcher (has more HP, syncs better with Corpse hield)
5) Corpse Shield
6) Infected Claws (syncs better with wrist Legendary)
7) Soul Reaper
Hope this information helps you