Just one pole separates Valkenswaard United and the Shanghai Swans going into the final showdown on Saturday in Samorin.
The speedy Swede knocks two full seconds off his fellow countryman Peder Fredricson's time in the jump-off at the LGCT Rome.
Picturesque Circus Maximus, Italy, set the scene for the Swedish rider's first LGCT Grand Prix win aboard H&M Indiana.
The only rider to produce a clear round over the Frank Rothenberger-designed course, he edged Eve Jobs, who had just a single time fault.
The world number one piloted Bingo Ste Hermelle to grab a spot in the LGCT Super Grand at the GC Playoffs in Prague in November.
The grand finale of the CSI5* was the perfect tune-up prior to the Olympics for Brash (GBR) against a tough international field.
The stunning destination of Monte Carlo provided the backdrop for wins by the Paris Panthers in the GCL and Darragh Kenny in the grand prix.
The British rider triumphed aboard Ginger-Blue in an electrifying three-way jump-off in front of the Eiffel Tower.
The Swede was the fastest of the six-man jump-off field aboard Catch Me Not S to claim the winner's share of the €148,400 purse.
Peder Fredricson and Marcus Ehning logged flawless rounds to seal the deal, while Eric Lamaze and the Cascais Charms finish 9th overall.