his traint says

VANTAGE POINT: When making a ranged combat attack, modify Hawkeye's attack value by +1 for each target of the attack. When he hits 3 characters, he may give one hit character an action token if he doesn't assign that character any damage.

so if I give mind control or incap (via power plant.....entities...etc) to him, and shoot three figs and hit all three of them, then have them fight each other or give action toeksn to all then, can I give one of the hit fig an action token, since technically, i didn't assign any dmg to any one?

I don't see why that wouldn't work.

Right, that would work.

This is an if/then statement

IF he hits and doesn't assign damage to a character THEN he may give one hit character an action token

One caveat, if you mind controlled 3 characters, the first one won't be able to attack the other two

You hit, MC1 friendly, MC2 friendly, MC3 friendly
Give MC1 their action, now no longer friendly, MC2 can attack them
MC2 action resolves, now no longer friendly, MC3 can attack them
MC3 action resolves, now no longer friendly, MC action done

Are you saying that an attack that doesn't deal damage can't have damage be assigned (or not assigned), so it would not trigger the token effect?