if I was the Russian military advisor in Syria, I would train and organize them to be 4 tanks one armor car per team, best with a drone.
The effective operation model will be done observation to identify and pick a militant neighborhood, by high speed petrol, don't stop, give no time to be aimed.
Once identified target neighborhood, in a quick past and blind corner, drop off 2 sneaky light armed observers equipped with climb rope and hooks, and whisper radios, bino-scopes. They sneak up silently like snakes to high observation position where they can hear and see the neighborhood and see tanks.
Tanks stir up the militant's nest, violently. Observers and drone tells tanks where they flee, gather, hide, attempt to ambush, etc.
This way, surely I will kill way more of them than they could kill mine.
I don't require attack helicopters even.
In Syrian urban environment, actually infantry must adapt to electric bike or motorbike mounted. Electric for SILENT. Motor for speed. Very effective, can access everywhere. Can chase, and take cover, can flee, and reconnaissance, and rescue trapped or injured, RAPIDLY. These bikes are easily available, can even ship in from abroad. The military advisors from Russia did not see this. I am more war genius than them.
If ISIS tank killer teams goes on fast bikes, lots of tank crews' funeral are near.
