Eevee route:
Skip hearthome gym trainer
Lv26 Rival 3
2 candies before Aces to Lv30
Skip Porygon
Veilstone candy to Lv33

Eevee timesave:
-Skip trainer (~55s if blaze, more without)
-Skip specs 50% of the time (~14s total, ~7s avg)
Total = ~1:02

Eevee timeloss:
-Slower to get (~3s)
-Rival 3 at Lv26 (~30s - estimated avg timeloss)
-Extra candy (~16s)
-Extra heal on Wake sometimes (hard to quantify)
-Double 1 (~5s)
-Double 2 (~9s)
Total = ~1:03 (+ wake heal)


Conclusion: Eevee faster if not in blaze for hearthome gym trainer