Thanks to all for the time you invest to assist and create resources. I have been reading for months and am ready to ticket my first RTW.
This route says valid on the finnicky OW site. Everything after Part 1 is a shot in the dark just to get ticketed. I'm open to suggestions. Posting here for feedback before I call AA RTW.

Homebase: Pacific NW
Status: None, some HA, and AS miles.
Goal: create multiple trips, coming home in between. Acquire status for future trips.

1. Suggestions to keep taxes and fees low?
2. Alter route for the best (your favorite) Business Class product?

Part 1: HND-LHR-CDG-PDX (open to adding DOH or DBX or?)
Part 2: PDX-MIA-MEX-LAX (could change LAX) looking for warmth in winter
Part 3: SEA-JFK-PDX
Part 4: PDX-HNL-SYD-PER-SIN-HND (would like to get to Tahiti but couldn't figure it out)

Thanks in advance!