NOTE: this is a You Mad thread. liberal usage of ZOMG to elaborate the thread's dramatic effects.
Scenario: 10m normal spine of deathwing.
Raid compo: burst dmg heavy. doing heroic attempts of other easier bosses.
Your Spec: demo & destro (gear/reforged towards destro) - using destro here.
Team DK tank: "ZOMG, my dps is higher than yours!!!111!!!"
Facts: Team DK tank's dps higher than mine.
Facts: blood add died before i finished hard casting a soulfire
Facts: (big add's HP @ 50%, 2-3 stacks of blood) "ZOMG, big add's HP too low, no more dotz"
Facts: (3 seconds later) "ZOMG, whose dots are those" "locks & his imps"
Facts: (dps on tendons) "ZOMG, you did pathetic dmg on the tendons!!!111!"
Facts: (teammate gets fiery gripped) grip was loose before i finished hard casting a soulfire
Takeaway - use nether ward every 30 secs. wait for trinket drop.