LOC ops based on unconventional skirmishes dont call for heavy attack helos unless a vertical escalation is authorized; when was the last time heavy attack helos were used for current cross border situations; silly boy: Using such assets is nice but then we are looking at a proper declared war; which has a different set of rules to play by.
For unconventional ops like the current ones, heavy helos are not required; the enemy's posts can be easily taken out by 81 & 120mm artillery or with weapons like RPO flame throwers. Heck for regular cross border ops like now, artillery upto 105mm IFG combined with cross border raids is more than enough. The only helos needed are Mi-17s or Dhruvs for landing SF operatives and drones for monitoring and tracking.
Also the IA has no heavy attack helos in its commands, IAF currently operates the Mi-35 which will be replaced by 22 Apaches, AAC for IA has ordered 6 Apache on top of that. IA projects a need of 39 heavy attack apache helos which is more in line with what is needed along side 114 Light Combat Helos, 70 Rudras.
39 Heavy attack helos have a key requirement of anti tank ops and these will be used by the 3 strike corps to help their advance (13 per corp)
http://www.indiastrategic.in/2017/08/17/indian-army-sanctioned-apache-combat-helicopters/
The C-17s have already transported over a 100 T-72s and equal number of T-90 to Eastern Ladakh, where tank runs are possible.
http://www.india.com/news/india/ind...arunachal-pradesh-standoff-at-ladakh-1628436/
As for a ramp upto 5% GDP being allocated for defence, it will happen eventually, its inevitable and would need to be done by 2030 if defence needs are to be met in that timeline.