If you have a bunch of incoming nukes, why not just explode a series of nuke flares at high altitude? Assuming you can track the areas of the incoming missiles accurately. You want to be high enough to avoid EMP damage on the ground. And the density needs to be high enough to impact a large area in the sky.
In the movie "By Dawn's Early Light", Rebecca De Mornay's character is a co-pilot in a B-52 bomber on their way to the Soviet Union. They are being pursued by MIG fighter jets. She comes up with the idea to release one of their nukes and detonate it behind them over the mountains. The MIG jets are then destroyed when they fly into the explosion. She ends up with a literal blinded black eye when she looks directly at a nuclear explosion. They have heavy curtains in those planes to prevent being blinded by explosions. She peaked through the curtains.