Russians will stay quiet mostly this time, natural response from russians since we back stabbed them with our silence in prwvious wars which involved russia.
So, the war is coming and mostly unavoidable now as the latest talks between millitary officials failed.
If it is so, I think it will be mostly on the side of Aksai Chin towards Kashmir with Pakistan jumping in joy and helping from other end. China may not take much risk on the Bhutan and NE end where it may limit itself to small conflicts.
As you said, Russia may be silent. USA would be engaged with Venezuela and mostly North Korea so may not take the sides of India either. Although China is asking North Korea not to make any first strike, it may give a go ahead if USA tries to interfere. Many more things to speculate and nothing predictable.
More or less, A two front war is waiting for India and more chances of a world war.
I hope whatever I am thinking will become void for the sake of lives of innocents. But most wars happen when monarchs and dictators (In other words fools) rule the nations.
Looks like this is the time of Monarchs and foolsih dictators. We are also currently ruled by one.