A. I expect the Russians will be able to track inward bound flight of the Migs using their own AWACS.
B. That should give them location info for their satellite recon to ID precise locations.
C. Cruise or ballistic missile attack as done near Lviv.
B above is the most iffy part, depending on what further measures the Ukes have managed to move the planes on the ground, and the quality and concealment of revetments, etc.
#3 in your post is on point. I suspect the Ukes are using extemporized strips, like segments of highway.
These are early-model Mig-29, aren’t they? Not even used in Russia anymore, something like the equivalent of a late-model Phantom or an early model F-16? They’d probably be meat on the table if they are used.