PRC and PAK should go for more offensive capabilities like MIRVs along with ensuring a quasi ballistic pathway for their missiles. Even US BMD are not 100% effective forget about anything DRDO makes. The most important thing is that BMDs are costly and give an insignificant bang for the buck compared to ballistic missiles, which is still and for the foreseeable future will remain be the most potent destructive weapon built by mankind. Hegemonic dadas won't be able to keep up with a offensive build up which will ultimately suck them dry while a burgeoning china can keep up both a overwhelming offensive and far more effective BMD system thanks to its large economy. In short chanakyans have introduced BMD as a destabilising resource draining factor in line with their deceptive devilish ideology in a race in which they have not 1 in a billionth chance of winning.