First and foremost, I invite you all to open a new browser window and open this link to follow along with me.
World of Logs - Real Time Raid Analysis
Now select the "25 heroic" tab.
You can pick almost any player on any encounter on this list to bring up the overall raid dps for the encounter. If you hover over names you will see top damaging abilities. To the right of the names you will see "active time". If you click a specific name...