The only scenario where one of Colin/Christie and Rachel/Elissa are still in the race:
Leg 1: Tokyo (Art/JJ)
Leg 2: Laos (Bonehams)
Leg 3: Vietnam (KOR/NEL)
Leg 4: Vietnam (Eliza/Corinne)
Leg 5: Dubai (KOR/NEL)
Leg 6: Uganda (Janelle/Britney)
Leg 7: Switzerland (NEL)
Leg 8: Switzerland (Reillys OR Colin/Christie)
IF this is the timeline, then we are on Leg 9 now in Croatia with 6 teams left, 5 or 4 days until finale, and no more NELs.
Leg 9: Croatia (Elimination)
Leg 10: TBD (Elimination)
Leg 11: TBD (Elimination)
Leg 12: USA (Finale)
The thing that makes me think both Reillys and Colin/Chris were out in Switzerland, though, is i doubt that all NELs have already been used. When was the time they didn't have a NEL on the last 4 legs? Is it rare?