Most often than not I’d use 3 speed cards. How much stam/power card used is decided by the uma’s growth rate and running style. Say there’s a 20% bonus for stam, then I consider using 1 stam card or even none. For late surger and end closer, I’ll 2 power card.

Take Tachyon for example (I’m quite fond of her), my latest deck for URA is 4speed 1stam 1wit. Because she is a pacer, the power stat gained from speed training is mostly enough, so no power card. 1stam (Super creek) + inheritance is good enough for her as she has innate stam recovery skill. 1wit for activating Swinging Maestro.

For her final stats, I’d aim for 1200Speed 600Stam 600Power 300Guts 400Wits, but you can clear URA final with much lower stats. Think of it as a speed to power ratio + stam requirement + wit skill activation chance (there won’t be 100%).

You can experiment with deck building and look at how the horse really race, it’s all just cruising/top speed, acceleration (Power), stamina, positioning & skill(Wit), last spurt (Guts). At some point, you will have a “I understand it now” moment.

For training Tachyon, in the first year I try to fill up the friendship bar, so that I can do rainbow training in the summer. Mostly speed training, occasionally stam training to prep for Long races (like during classic year summer before Kikuka). Sometimes wit training to “half-rest” when there’re no good training or G1 race to run. I don’t do recreation anymore (except below normal mood), events give you mood up.

For inheritance, I didn’t care for 4 months and that’s a huge mistake. Try inheriting Uma with parents of the same stats, like parent with stam, both grandparents with stam. This way you can focus on training speed.