The future will tell us my friend, I want an end to the conflict, where the people there and neighboring countries can have a break. I believe that would be through a long term truce, where everything remains as is, except ISIS lose territory, and FSA take over northern border areas with Turkey, and Kurds will remain south of those areas, then go to negotiating table and implement truce, this is realistic option.
Unfortunately, international community(East and West) has no interest in this, and would like to prolong conflict.