DEL or ex-India is only the lower than the others you mentioned on base fare. But India has a very substantial 18% GST on business class tickets that makes it less competitive unless it's a lot cheaper to position there vs. Japan, Norway, or South Africa. Same with ex-Pakistan, tax for business class tickets is even higher than India. .

I don't advise buying through the online tool because it'll usually ticket with QF and you can optimize YQ/YR with a travel agent, but you can run a simulation through the tool with similar itineraries and you'll see that ex-India is a bit more expensive than ex-Japan, ex-Norway, and ex-South Africa (though note ex-South Africa you must have a DONE4 or higher, DONE3 isn't possible)