well some video game strategies are based on real world examples
But joking aside, this is actually NOT based on some video game strategy or some movie. It actually has been used in WWII. The entire concept is based on Russia's world war 2 strategy against the germans when they got bogged down during the harsh Russian winter really. Even though they were bogged down, they were still well armed but just not going anywhere due to winter. What the Russians did was flood the german lines with soviet conscripts as cannon fodders to absorb the nazi german fire. Yes it was a turkey shoot for the germans with dead soviet conscript bodies every where but in a matter of hours, what the germans thought was their victory soon turned into their defeat when they realized that they were now either low on ammo or completely out with soviet armor headed their way on the horizon followed by the true soviet army. Now, having said that, just replace the well dug in german soldiers with indian air defences. replace the soviet conscripted cannon fodders with armed drones, replace hours with minutes and replace the soviet armor with SSMs and PAF. Get the picture?
Now I know there can be other more effective solutions. All that I am saying that this overhelming strategy too is an effective solution. It's a solution that Pakistan can deploy like NOW! Until a more advanced solution is in place, this can effectively send shivers up the indian spines (as you can tell from dangar007's reaction).
ratheon has already developed a similar but more advanced strategy where they use air launched drones to have the S400s start tracking them The drones are armed forcing the radards to track them. When they start tracking the drones then they launch anti-radiation missiles against the source of the radiation, i.e. S400. So yeah, they've already implemented a more advanced version of the solution that I am proposing.
fyi, your own picture answered your question. Here's the break down: So each system supports up to 12 launchers with 4 missiles each, right? So that's 4 x 12 = 48 SAM missiles. Correct? Let's make it more interesting. Suppose this entire S400 battery is 200 KM away from the border. On top of that, in between the border and the S400 battery, suppose that there are 2 AA gun regiments and 2 short range SAM regiments with 50 SAM missiles each. That is 100 short range SAMs with 48 S400 missiles and any number of AA gun rounds. Given the ineffective performance of AA guns during the iraq war by the iraqi military, I won't bother to take them into account (let's face it, they are a last ditch effort when all else has failed). So effectively, you have a defence of 150 SAM missiles which include 100 short range SAMs and 48 S400 missiles. Pakistan just has to launch 151 armed drones. THAT'S IT! In that case, WORST CASE scenario is that 1 armed drone is BOUND to make it to the S400 launch site and destroy it. It literally has to just take our the radar sites which will render the entire S400 battery useless. And as I said, that is the WORST case scenario. Practically, a far more than 1 would make it through the indian defences, that is guaranteed.
Is this an expense solution? YES. Can there be better solutions. OF COURSE. But it will make indian loses of the S400 far more expensive. The loss of our drones may run into millions of dollars but the loss of S400 batteries will run into billions of dollars for the indians. So all that I am saying is that this IS a solution that can be deployed until a better and more cost effective one is developed. Not rocket science people!