For the groups in syria this map is very good and a good aproximation of the area they control.
I've found a few weeks ago a very good article in a french paper (if you need help with the translation, I'll help you) that shows in details the evolution of the war in syria (it shows both controled and influenced surfaces)
http://www.lemonde.fr/les-decodeurs/visuel/2016/01/19/syrie-irak-deux-annees-de-guerre-cartographiees-acteur-par-acteur_4849580_4355770.html