The only solution is the one we broker 100% our way. Our way or the highway.
End ISIS, and dictate exactly what each party will now do. No hand wringing, no nation-building, and no quarter. Russia: go back to barracks. Turkey, go back to being a secular beacon instead of the uppity deal-breaker you are going for. Get out of the sack with Russia, by the way! Assad: get a referendum, or get the hell out. yesterday. ISIS: die in place. Iran: shrink back to your own borders, and STFU. You are hereby decertified as a nation. That means you have no hand outside your borders.
Lebanon: what the hell are you doing standing there with your hands in your pockets? Jordan? Grrrr.
EU: pack up the Syrian refugees and send them back to the sh!thole they were born in. We will all (all of us in the free West) be happy to pay you in meals and dollars for every day you spend cleaning up rubble and rebuilding. Form any kind of government you want because we don't GAF. Except Muslim Extremist! Don't make me come in there and tell you this again!
AD readers. Don't be pussies. Here we have the makings of a possible WW III. Put on your big boy and big girl pants and get this thing resolved before we have a bigger conflict.
In my estimate, the US (Trump) is putting together an op to take down ISIS. No. You will not be consulted.