Not sure if this build works the way I think it might, but I wanted to see if these class features, feats, etc interact like I think they do...
So we're taking Fighter (Weapon Master) 3 to get Weapon Master class feature early to qualify for Ricochet Toss (Weapon Mastery) feat.
We're using a Throwing Shield
We're taking the Rogue (Scout) to at least level 4 for the ability to make their attack deal sneak attack damage.
The build would like something like this:
Fighter (Weapon Master) 3 / Rogue (Scout) 4
FEATS
Lvl 1) Quick Draw
Fighter Lvl 1) Point Blank Shot
Fighter Lvl 2) Precise Shot
Lvl 3) Quick Stow
Lvl 5) Accomplished Sneak Attacker
Lvl 7) Ricochet Toss (Weapon Mastery)
Comes online at level 7
So the idea is to charge at an opponent and use your free action from the Throwing Shield (which, since it is a free action I assume you can do during the charge or after) and qualify for Sneak Attack from Scout. Ricochet Shot is of course for the shield to return instantly (as opposed to the end of your round as something like a Returning Shield would do, or the Brawler (Shield Expert) feature would do).
Also since this is a free action (this is the theorycraft part) to throw the Throwing Shield, you could technically get "infinite" attacks with Sneak Attack on each one, since you did perform a Scout Charge in the same round.
The Quick Stow feat *might* not be necessary, but I added it to counter the argument that the Throwing Shield says you need to "unclasp and throw" as the free action, meaning if you can't do both, you can't use the ability...
Scout Charge > Free Action unclasp and throw Throwing Shield at enemy (which can be done in the middle of your charge sine it is a free action), make attack roll, apply sneak attack (since you charged as Scout), shield returns after the attack, Quick Stow - Rinse and Repeat as free actions.
