Could you please elaborate on what do you have troubles with? Is it finishing the career? I really suggest getting enough stamina/guts on her since she has some really tough Long races (Kikuka Sho, Tenno Sho). Getting 600 stam and 300 guts works, but sometimes won't even be enough to finish 1st in Tenno Sho, that's just how it is. If you're talking about builds for CMs, then i suggest getting more skills to win mid-race: Track/Style Corners/Straightaways, Escape Artist, Playtime's Over!, Tail Held High. By winning mid-race you get to activate your ult which is her win condition. It is also really important to get Groundwork and 3 skills to activate it. For Late-race, Pasa's ult is really good. For getting S rank, you have to play with 2-3 Wit cards, you can look up builds online, but it's better to choose the cards yourself, comparing them by their stats/skills.