Light's Gambit Champion

There is a kid at a table called Rytr Paller that has the title <Light's Gambit Challenger> at Dunelle's Kindness in Hallowfall - Right clicking on him brings up a dialogue box to challenge him to a game of Light's Gambit. Beat him at the Master Formation to receive the achievement Light's Gambit Champion.

/way 69.11, 45.66 Rytr Paller Light Gambit Challenger

Strat (Always switch if the piece you are on has their abilities on cooldown):
Knight: Move to opposition cleric with holy assault - when it gets to cleric use assault with that piece as much as you can on the cleric while dodging him out of the way of the black frontal from the opposition Castle.
Cleric: Spam Heal while opposition Knight is alive - then focus on opposition Cleric / Castle with Smite
Castle: Use Cannon Fire (long cooldown) on opposition Knight > Then Cleric > Then Castle

Hope that helps, all the best!

Use your knight, jump behind the castle, use holy assault while making sure to stay behind the castle. you can pretty much solo all 3 of the other pieces with just your knight. I tend to focus the cleric down first though.

You can move the knight behind the castle and just spam holy assault as well so the frontal will never hit you