ADDON DID NOT WORK!
Sorry guys, i have no time to test and fix that addon, because i have to manage my raid most of raid time -_- So i have 1-2 pulls per week to test it.
Neltharion Blood Tracker
Simple AddOn, made for easy Blood tracking on Spine of Deathwing HC.
Lists your raid members, sorted by role (tank>healer>dps/no role)

You can change position and scale, as well as enable or disable addon with /nbt command.