Main battle lines are not going to be so far apart that you can play slice and dice. War is not a static thing where trenches are dug. Battle lines are troops,, tanks and artillery positions. Look through Punjab, how many battle lines do you think can be bypassed. All the Indian troops will do is come under heavy fire from two different sides with what you are saying.
Whatever the rhetoric they are feeding you, they will go for main battle lines, which is why all organised training consists of heavy armour and quite a lot of it along with air force .
Maybe in Sindh deserts what you are trying could be possible, but there the use of excessive force for Pakistan would not be an issue because it is desert land.