Show Me Your Moves!

Trigger the achievement during a gas phase when no adds are present, or on the very first Opportunistic Strike of the fight — this removes the risk of interference from other constructs and gives the entire raid a clean window to act.

Focus all raid members on a single boss and have the second tank keep the other boss positioned roughly where it would normally be tanked, moving it slightly closer if needed to reduce the distance raiders must cover to land their Opportunistic Strike.

Druids and Warriors can use Charge to quickly reach the target; a Priest can use Life Grip on the second tank to pull them into position — have a macro or the correct boss targeted before the dance begins so there is no delay when it is time to strike. A Swiftness Potion can replace a DPS potion to make reaching the target nearly effortless, and a Hunter running Aspect of the Pack gives the whole raid a speed boost that makes failing to reach the target in time very unlikely.

The trickiest combo is a Stomp followed by a cleave aimed in the direction you ran to avoid the Stomp — run back in immediately after the Stomp rather than pausing to watch for the next cleave, and save Stampeding Roar for movement during combo sequences. If multiple combos are staggered, hold position and wait for them to finish before committing to the strike, since the second tank still earns credit as long as their Opportunistic Strike lands before the next dance phase begins.

Every single member of the raid must land an Opportunistic Strike on the same construct within the same Unbalanced phase — if even one player misses, no credit is awarded, so rehearse the combo-dodging and movement in Raid Finder before attempting the achievement on Normal or Heroic.