It is interesting that the online tool suggests that routing is valid.
If you are looking to score a few more TPs you might also want to see if you can re-jig your SE Asia sectors to include NRT-SIN. This sector is above the magic 2000 miles whereas the other sectors you have are not.
As you have sectors to spare you could also look into a weekend in Europe to one of the 60 TP destinations or an out and back. Of course this depends on how much time you have to spare.