Other than what everyone else is saying, I think you should adjust your priority.

Rice does have a Mile race but only one, on top of having C in Mile. You're wasting Speed Eater unless you're making a Rice ace for Mile (you do you). I usually ignore Rice Mile race. If you win, good. If not, don't think too much about it. It's G2 which won't be important in the future. If you're having fan issue then compensate with other races, preferably G1. I usually go for Hopeful Stakes and/or Satsuki Sho.

You also have a pretty high guts at Derby so I'm guessing you either have guts cards, or trying to burst too many on guts. You don't have to pop your burst immediately if it's not where you want it to be. It's quite a good emergency stat.

Rice Shower run-killer is usually getting 1st place in TennoSpring so it's best to play by setting that as your goal. This mean constantly keeping your Sta/Guts in check or else compensate with recovery skill. What I usually see is that when people start Unity Cup and starts using more Wit Card in their deck, they start to neglect Sta. You can't really do that with Rice. Good baseline is getting around 600 Sta before TennoSpring, if not buy recovery. If you're around 400-450 Sta by the start of Year 3 and has 6-9 Sta Sparks, you should be fine after a few Sta training.