By Continental, do you mean the World Cup Qualifiers? For a country just outside of the top 4 in my continent (and Asia generally being a weaker continent), continental wins are much easier to get compared to Consolation wins. And another thing about the Consolation tourney (which I seriously dislike), the pairings are like Russian Roulette. You might be really unlucky to get smacked with a lot of strong opponents for the whole season, or get paired with terrible opponent's throughout the season and make the playoffs despite having a weak team.
Giving points based on result against your opponent's NT rankings should be the closest thing to a reliable measure.