My first RTW, an AONE5, is about 75% done, but I want to nest in a DONE4 ex IST starting next month.

This is the plan:

IST-LHR (5/23, break, and take LHR-TPA round trip flights)
LHR-SYD-WLG (~6/15, vacation time)
WLG-BNE-SYD-CGK (~6/23, business stop)
CGK-HKG-JFK (6/27, return to TPA on DL flight)
TPA-DFW-LAX-SJU-TPA (any July weekend mileage run)
TPA-DFW-YVR-LHR-HEL (8/9, business stop in HEL, get BA flight ex YVR)
HEL-LHR-IST (8/15, may or may not fly last sector)

The Validator says this is OK, and is 18 segments and 47,120 miles.

The only required stops are Wellington, Jakarta (not neccessarily in that order) and Helsinki (last).

Any suggestions for improvements, and/or for using the 2 additional segments?