Focusing on point defence is already giving up 90% of your interception opportunities, that’s equivalent to thinking beefing up the defences of warships is to just spam more CIWS turrets.
The biggest issue with Russia is its huge size and massive land boarders with hostile forces. They also lack investment in internal security. China doesn’t spend more on internal security than the PLA budget for no reason.
But both of those are massive systematic issues that cannot be easily solved even in the medium term, if ever. So the best way to deal the risks of such attacks isn’t to play purely defence but to go on the offensive at source and impose unacceptable costs on the attackers such that they are forced to show restraint.
On the tactical level, bare minimum additional security features should be implemented at a minimum can include:
- banning large commercial vehicles from coming within 20km of sensitive military sites, with strict police enforcement of that rule.
- imposing cell signal blackout of 5-10km around such sites with jammers operating 24/7.
- routine randomised repositioning of aircraft and other mobile high value assets.
- point defences (laser, microwave, hard rounds and missiles, maybe even interceptor drones) installed to cover the whole perimeter of such sites, with a zero tolerance, shoot first ask questions later approach to any unidentified flying objects that comes within 1km of the perimeter.
- space aimed satellite signal jammers to disrupt starlink based C&C of drones. Potentially airship based persistent medium altitude jammers designed to further disrupt satellite comms with low altitude drones
- install rapid deploying helium barrage balloon anchored net networks around the base perimeter and maybe also tactically within the base such that if alerted of a drone swarm attack, the balloons will deploy within seconds to erect anti-drone nets dozens of metres high around the base and inside. The nets should be fine enough to be functionally invisible to drone based sensors. With signal disruption preventing man-in-the-loop command, it should prove very effective at stopping drones en mass.
But even with all of that, you cannot guarantee to be able to stop drone swarm attacks.