Let's be honest, stratolance isn't what we'd call an effective system.
It's top speed is nothing remarkable, being only Mach 3.7 at anywhere but high altitude
A long warning time allowing planes to react with plenty of time to spare
A radar that's not really capable at detecting stealth aircraft at a decent range
And only a mediocre ABM defending only a 15km radius.
(although that was a given since it was never designed to intercept TBMs to begin with.)
Now all this would be fine on heartland, small map as it is, but it hits much harder in ignus, where it's issues are amplified.
I suggest either buffing it or placing a longer range dual SAM/ABM platform in ignus, and placing the stratolance as more of a medium range SAM system.
Much like the Aegis Ashore system in real life,
it would be a static hardened emplacement with a radar/fire control building and several VLS cells.
It would fire missiles that are not nessasarily longer ranged, but much faster and deadlier, Being ARH instead of SARH, and capable of mid-end stage intercept of TBMs at much further range than the stratolance. Buildings and the VLS cells are Hardened, requiring munitions such as augers to destroy. The fire control building will also have the capability to locate track with radar emissions not unlike the medusa. It can also detect stealth aircraft at further range than radar trucks, with potential look down shoot down capability.