Having a lot of fun with MANT/Trackblazer/etc. so far - it completely cured my burnout on the game, towards the end of Unity I was doing 1 run or less a day, despite still feeling like I should try to prep for Aquarius cup. (I ended up winning A group cleanly with the stuff I made before it started, so whatever...)
I expected not to like MANT much - was worried about the run length and amount of menuing, but turns out that the more complex decision trees are a lot more interactive & stimulating than the prior two scenarios, it's not just braindead click the good trainings and up arrows. We'll see if this lasts long term, I may get tired of it eventually or soon, but I didn't like Unity at release and it stayed that way, so hopefully this one sticks.
If you're having trouble with the new scenario, this guide is a great starting point:
https://uma.guide/guides/trackblazer
One of my friends worked on it, so I have to shill it. I'd definitely recommend setting up a few schedules like the examples given and then loading it each time and adjusting on the fly. There's a ton of other useful guides on the site, just click around and you'll find stuff like CM prep guides and support card/uma pull recommendations.
Here's a build I was able to make today, if it tests well (not sure if it meets stam requirement) and I don't get anything better, I may just run this on the next CM and focus on other characters like Kitasan + someone else.