How does this S400 procurement become a game-changer vis-a-vis Pakistan when Pakistan's strategy during all these years has simply been to Defend and Deny ? Pakistan's strategy involves use of TNWs in the event of any cold-start approach by India and the nuclear threshold that Pakistan has set, assures Mutually Assured Destruction, which is a strong-enough deterrent for India against any offensive ideas towards Pakistan.
Yes, the S400 is indeed relevant vis-a-vis India-China.
india has no use for the s-400 versus pakistan
it is safe to say pakistan will not be getting s-400