Got my wings yesterday thanks to this guides! Soloed all of them except for Roland. I don't know what I was doing wrong, but I couldn't kill everything within the time limit.
It was the last set dungeon I needed and after spending the whole day trying to drop/upgrade into a Golden Flense (oh, yes, I mastered all dungeons with fresh seasonal toons) I gave up after 20+ tries and asked a friend to help me kill the mobs after completing the main objectives.
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The videos are linked into each of the builds! Click on each individual build and there's a YouTube embedded video