VKS undoubtedly has a huge range advantage, and I cannot see the ZSU being able to alter that. The F-16s probably are by far the best A2A equipment they have operated, but coming in distant second place is still dead, even if it’s a huge improvement over MiG-29.
If they still have those ASC-890s and they are datalinked to the F-16s, they could perhaps briefly solve the radar problem (with a lot of risk to a high end, two plane force) but the AIM-120s range limits compared to R-37 is so stark as to make a successful AAM engagement almost hopeless. Certainly it would at a minimum have to be something of an ambush against unsuspecting targets or targets whose escorts were heavily jammed, or both.
Wonder if Meteor missiles could turn the tide. Of all the planes proposed to Ukraine, only Grippen could carry them. Wonder if there ever were plans to integrate Meteor on Mirage 2000-5s - probably not.