A time for Ending B is now on the board. However... There are a LOT of improvements to the route that could be done by someone who's better at this than me:

• Not use a crappy third-party controller at first so you can get through the licences to the required EXP amount faster (and gold them to go faster still).
• Get at least one gold in the AMG (Lv.6) challenges to likely avoid having to do Karting, then one Gold on the Lv.12 AMG challenges to make up for the money lost from not doing Karting.
• Not spend half an hour failing on the NASCAR events.
• Use auto-gearing to give the ZR1 a top speed of roughly 390km/h (~245-250mph), set downforce to max.
• First try Gold the WRC challenges to get a Turbo car and skip some of the Tuning Car Championship grind, or complete the Tuning Car Championship to get a Turbo car, so you can get onto the faster EXP grind from High Speed Ring at Lv.17, and not buy a car.
• Remember to tune said Turbo car.
• (optional) Do the AMG [Advanced] events at Lv.18?
• Stick to whichever of Grand Valley Speedway or Circuito de Madrid you feel comfortable with for the Lv.19 - 21 grind. Both give near equal EXP/minute.
• Win the LTW race at Minneapolopoloooza first try, then do the long Daytona Speedway to get the Minolta faster.
• Set the Minolta to have a top speed of 410km/h (~255mph) to allow for better overtakes during the LTW grind
• I'm unsure if American Championship is worth it for the bonus EXP at cost of going slower per race.
• Make sure the XJR-9 in Dream Car Championship is near the back; 8th - 12th is fine. This is important for skipping the last race as it will ALWAYS come in second behind you during the other events.
• SKIP NURBURGRING 24H AND STOP TIMING THEN, NOT CIRCUIT DE LA SARTHE. PLEASE SAVE YOUR SANITY

Mod Note: Retimed due to new timing rule