Hundreds of Iranian troops have arrived in Syria in the last 10 days and will soon join government forces and their Lebanese Hezbollah allies in a major ground offensive backed by Russian air strikes, two Lebanese sources told Reuters.
http://www.reuters.com/article/2015/10/01/us-mideast-crisis-syria-iranians-idUSKCN0RV4DN20151001
I have some doubts about these numbers. For one thing, there’s more than one Russian SAM in Syria
The Planes I saw on BBC are not Sukhoi Su-34 ,but much older like the Sukhoi Su-24
Your poster forgot the Israeli forces, the most important of which is the Mark I Lord of Hosts. :>)
Oh, and the single most highly combat-experienced air force in the region, if not the world.