>>545854273
I'm NTA >>545854131 but know that speed growth rates are a factor unless you get a god run. Grass Wonder has 20% speed growth so 3 speed and a pal card will get her there easily. Picrel is me doing an attempt of refining Mayano for TT, and I was dumb for attempting this because base Mayano has no speed growth rate, I'd either have to swap out Tazuna for another speed card or probably bring speed sparks. No real mistakes were made outside of me having a retard moment and skipping Hopeless Stakes for a 4 chevron stack on guts, probably wasn't that worth so I wasted two turns to meet her 10k fan quota. Probably would help with the pal cards having another limit break to get training effective, but it is what it is.
TL;DR It'll take experimenting, but speed growth is a factor in your deck. This was also ran with 12* power 3* stamina and 1* wit, had an unfortunate grandparent lol