India has a better military, but Pakistan could draw on Islamic extremists from around the Middle East (Iran and others). Then you have to throw in Kashmir, which is an incredibly important area for both countries.
Guerilla warfare is usefull mostly only on county's own land, i expect, that sabotage actions on enemy land wont be succesfull, if they wouldnt have the support of local people majority. I would say, that in land conflict India's army will beat Pakistan's one. But, also, foreign support will have the high value, not decisive, but quite high.