History of Best in Class (triumph)

Best in Class is a Crucible triumph: "Rumble: In a single life, defeat at least one Hunter, one Titan, and one Warlock."

How to complete

1. Queue Rumble, the free-for-all playlist, so every opponent is a different Guardian with a random class.
2. Stay alive after your first kill and scout the class of each opponent (class-specific armor, cloaks, marks and bonds are visible).
3. Pick off one of each class without dying. Fight near cover and avoid third-party fights. Retreat after a kill to reset health.
4. A single death ends the attempt, so patience beats aggression. Play low in the scoreboard if you need a few more matches for a good class mix.

Notes

The triumph tracks "Medals earned", so the matching medal appears on the end-of-match screen. I found no source that documents a different method or a specific seal for this triumph; sourcing for the medal list is the Shacknews Crucible medal guide, which does not describe this one specifically.