If thats the reason why not wait for LCH a little bit( 2 years is quite little compared to other delays) and then buy more LCH instead of rudras and during a war LCH can escort the choppers taking supply.
And since LCH is a pure gunship it will be better in this job too.And do we have any kind of offensive weapons on Dhruvs like Black hawks have machine guns on it??
If IA gets enough Rudra's they could be our own 'Hueys' of vietname fame. Hueys started out as light transport and earned its fame as an assault helicopter.
Bell UH-1 "Huey"