How is it expected to be layered?
Considering you either put it on a chassis that rolls up with the column for anti UAV, helicopters or fixed wing -
Where does Akash S1 go? For FOBs along with QR-SaM?
an armored column is moving, it's got Convoy Trucks, It's got IFV, it's got APCs, It's got Tanks and you have to protect all these things
Now the threats it can face are as follows
• Mini and Micro Drones (the likes of DJI Mavic) (10m to 1000m)
• Then we have Battlefield Drones (the likes of Nishant)
• Then Come LoS drones like Burraq 2 on low end and TB 2 on high end
• After this are Enemy Helicopters and Standard (30k feet 24 hr) MALE drones
• And now at the extreme end of the spectrum are HALE drones and fighter jets
To protect against all these threats here is how the layering is going to be
0. Shoulder Fire VSHORAD for the soldier Squad
1. BEL D4 system (Drone Detect, Deter & Destroy) which has a 2kW laser system and various electronic soft kill systems, mainly useful against Mini Drones

2. Vehicle Mounted VSHORAD (A Launcher with 4 VSHORAD is under fabrication) + Shilka Gun System against Battlefield Drones + Mini Drones .
Basically a jugaadu Type 625 AA system with 4×4 vehicles only having VSHORAD missiles, Also useful againsts targets that QRSAM might have missed.
Will most likely be seen with a platoon
3. QRSAM with 30km range against Helicopters and LoS Drones
4. Slow moving but Still Mobile MRSAM against High End MALE and even HALE drones
From here onwards it's IAF's responsibility to provide protection
Another Scenario is Stationary FoBs
Here the threats are the same but the defense strategy is somewhat changed
Most things Remain the Same but Instead of mounting VSHORAD on Vehicles it's used as a stationary last line of Defence along with 40mm CIWS guns, scattered all around the FoB similar to how French do it
Another Difference is instead of using QRSAM, now much less mobile Akash Systems are used.
To grossly oversimplify QRSAM is used when the Convoy is moving, Akash is used when Convoy is resting
It's not entirely accurate but that's the gist of it and now you know where Akash S1 is used