Below is my actual story of killing teq that just happened.
I spent about 35 minutes spamming Join in Sparkfly Fen to get into the main server. I finally got in and Teq had 3 minutes left and about 20% HP. I killed him, got a bunch of dragon chests with nothing good, but I got like 3 achievements, yay!
Just so everyone knows I feel 0 sense of accomplishment, and if I legitimately was there learning the fight and spent all 15mins there, I still wouldn’t have. A heroic raid encounter in open world is a stupid zerg fest. WoW heroic raids are actual accomplishments. You are part of a small team there and what you do actually matters. You can’t feel accomplishment in a zerg. You being there really has no actual impact.