How can the Free Syrian Army win the Syrian Civil War?

The political situation being what it is, I cannot see a reasonable end to this conflict. Unlike many civil wars, this one has many interested parties each with very different aims. The Turks, Israelis, Iraqis, and Kurds all have an oar in the water so to speak - each rowing out of sync ! - The Russians and US wait on the edge. Nothing in this affair is simple, very little is straightforward military action. This could be one of the first civil wars involving 'cyber technology' and we will never know for certain what happens behind the scenes.

In order to win the Syrian Civil War, the Free Syrian Army would need training (likely from the US), a unified organizational structure, foreign monetary assistance, and military assistance from the US-led Coalition to bomb Islamic State and the Assad Regime targets in advance of the FSA advance.