Speak to Ajarn again. He will zone you into a special instance of Silent Fist Dojo
Defeat the 3 Masters.
The Masters (Ajarn, Laharn Rahai and Amazu Kharliko) all scale to your level and are even con solo. They are not linked, and it may be possible to get in a corner of the dojo so you don't have to fight all 3 at once. Note that you can take a mercenary into the zone if you're having difficulty.
Speak to Ajarn
Return to Lakosha in South Qeynos, Qeynos Capitol District