no , a surprise attack can destroy them all , the enemy always had massive edge on sky on us ...
anyway, buying Su35 with its downgraded PESA radar which Russia will give all of its characteristic to the Zions is useless ...
even having Kowsar 2 with only optic capability and short-range optical missiles are more useful than Russians useless birds ...
Well, one of the obvious result of this is complete shot down of Iran-Russia military relationship, in best we will just buy some chopper and Armor vehicles from them