TG Miles expire after a few years. I've met more than a few people that had their miles dissapear... and that really stinks.
Then again, ROP status is good for 2 years.

Have you ever thought of United Mileage Plus Status.

They fly to all the places you list, with the exception of Manila (UA code-shares to MNL through HKG and NRT).

When you fly UA metal as a (50,000 mile flyer and up) you will recieve 100% mile flight bonus.

And your paid J (C) flights can be upgraded to F... (from miles you're earning at double the speed)

just my 2 cents