An interesting note from TAR 14: Phil was almost always a day ahead of the field, exceptions discussed below. We have the Tokyo leg ending on Monday 20 Jul, and the HCMC leg on Thursday 23 Jul. That gives us enough time for only one spare Phil day, ie...
20 Jul: Tokyo finish. Phil goes to Leg 2.
21 Jul: Pit Stop release delayed. Spare Phil day to prepare Leg 2.
22 Jul: Leg 2 finish. Phil goes quickly to HCMC.
23 Jul: Phil films HCMC quickly, racing with the teams.
20 Jul: Tokyo finish. Phil goes quickly to Leg 2.
21 Jul: Phil films Leg 2 quickly, racing with the teams. Phil then goes to HCMC.
22 Jul: Pit Stop release delayed. Spare Phil day to prepare HCMC.
23 Jul: HCMC finish.
We see the pattern continuing with the next two legs:
Phnom Penh, 24 Jul being Phil's free day, 25 Jul the actual racing day.
Dubai, 26 Jul being Phil's free day, 27 Jul the actual racing day.
The two exceptions in TAR 14 were Stechelberg to Vienna (~430 mil), where Phil took a production van; and Phuket to Bangkok (~420 mil), which are within the same country. Apart from Krasnoyarsk-Novosibirsk (~390 mil), which is a headache transport-wise, these are the two shortest legs in the season. I'm guessing Leg 2 is very accessible from either Tokyo or Ho Chi Minh City. And since Phil's in a bit of a rush trying to get to the Pit Stop in the morning for HCMC, I'm guessing he'd use the rest day there. Educated guess conclusion: Leg 2, Japan.
Tokyo to Kyoto/Osaka (310 mil), Sapporo (490 mil), Seoul (780 mil)
HCMC to Da Nang (370 mil), Vientiane (560 mil), Hanoi (710 mil)
Appendix: TAR 14 simplified timeline
1 Nov: Phil Leg 1; 2 Nov: Racers Leg 1
3 Nov: Phil/Racers Leg 2
4 Nov: Phil Leg 3; 5 Nov: Racers Leg 3
6 Nov: Phil travels; 7 Nov: Phil Leg 4, racers travel; 8 Nov: Racers Leg 4
9 Nov: Phil Leg 5; 10 Nov: Racers Leg 5
11 Nov: Phil travels; 12 Nov: Phil Leg 6, racers travel; 13 Nov: Racers Leg 6
14 Nov: Phil Leg 7; 15 Nov: Racers Leg 7
16 Nov: Phil/Racers Leg 8
17 Nov: Phil Leg 9; 18 Nov: Racers Leg 9
19 Nov: Phil Leg 10; 20 Nov: Racers Leg 10
21 Nov: Phil/Racers Leg 11