1) arm everyone. just drop crates of AK-47s into those countries. ISIS alreay has them, and their guys can only hold one at a time. Arm every other motherfccker in that country.
2) drop leaflets with every name, pic, detail of suspected ISIS people in that area, along with a "$10,000 and legal entry to the USA" for any civilian that pops a bad guy.
We wouldn't need boots on the ground - just collection centers for the villiagers to being in the bad guys they popped. And I have no problem with letting in any syrian who capped a member of ISIS, he's a war hero and has earned citizenship, and done a heck of a lot more than the politicians or armchair messsage board kids.