Some RSAs are useless. Another one not quite suited is the one b/w ASH-GKP ICE and LJN-PPTA ICE. Due to the long distance and often delayed run of the latter, it has ~8 AC coaches now including an AC 2 Tier. It makes sense on a 500+ km route; but not for an ICE, especially one that goes via loop line to GKP.
The Intercity via main line b/w Lucknow and Gorakhpur does perfect with only 3 AC Chair Cars.