The main problem I'm having with it is combining both moving the target to an adjacent square, and also causing stun with the same attack. It's easy to do one or the other, but not so much for both.
The best idea I've got requires a very strict RAW viewpoint, Hamatula Strike, and a Kyoketsu Shoge that is at least +1 with Ki Focus.
Hamatula Strike requires a piercing weapon, Ki Focus requires a melee weapon, and Flurry of Blows requires a Monk weapon. The Kyoketsu Shoge covers all of that and allows an attack at a range of 20ft.
The strict RAW viewpoint kicks in when you look at the 5th sentence of the CRB's rules for grappling: "If you successfully grapple a creature that is not adjacent to you, move that creature to an adjacent open space (if no space is available, your grapple fails)."
The idea would work like this: Start turn with nearest foe at a distance of 10-20 ft away, use first attack from Flurry of Blows to attack at range with Kyoketsu Shoge+Stunning Fist. If attack hits and does damage, the foe is forced to save vs stun and I get a free grapple check. If my grapple check succeeds, the foe is moved to the nearest adjacent square allowing me to continue attacking with Flurry of Blows.
Now I've never played a grapple based character so my understanding of the rules involving it are lacking at best. More importantly, even if the above rule would work in my favor, I highly doubt I could ever convince any GM to allow it. Couldn't say I'd blame them either.
Sorry for such a long post and thanks for your time.
