Hey there,
I am wondering how I could use Trainerroad best to prepare for multi-day ultra endurance events. To race such events competitive you usually ride through the first night for 36h straight (500-600km), then sleep 3-4h. The next days you repeat the cycle of riding 16-20h and resting 3-4hs until you reach the finish line (usually after around 3-10 days depending on the event).
I have already completed events like the Transcontinental Race (w/ 33y, 77kg, 4,1w/kg) and know training principles quite well. I usually trained with a reverse polarized approach. VO2max + Z2 ride indoor in winter where the weather wouldnt allow for longer rides and high volume, to increase VO2max / raw enginge size and then slowly progress to more SwSp and long back-to-back rides for musculare endurace / efficiency / fatigue resistance as the weather improves and the event comes closer.
I now want to use Trainerroad with all the cool new AI features to optimize my training, but struggle a bit to make it work. I can’t map these multi-day ultra events as an A-Event and I also find that the plans do not really match the nature of those multi-day ultras. I have also played a bit with the AI and when choosing a custom plan the predicted FTP is lower than when I manually put in my usualy training sessions.
Any ideas are welcome 
Cheers,
Erik