Need help with uh dk pvp

Ravencrest and Uldaman
1

I am a bit lost with UH like what is my priority rotation for burst?
army of dead plus dark transformation

  1. Soul Reaper
  2. Scourge strike and death coil (which one to spam more?)

Do i even use festering strike?
Soul reap only uses 2x putrefy so do I use third one?