Questions about the optimal breeding for mounts

do we know of the most efficient way to breed/feed mounts yet?
for lvl 1 mounts I've been using

Copper Gem
Gudgeon Meat
Copper Gem
Gudgeon Oil
Copper Ingot
Gudgeon Oil
Copper Ingot
Wheat Grains
Oak Wood
Wheat String
Oak Paper
Oak Wood
Wheat String
Oak Paper
This is to maximize energy and training as fast as possible for the most efficient training. It also uses the absolute minimum number of materials to achieve the best outcome (I suppose I didn't consider training and using more than lvl 1 materials)

Idk for the other generations if it would be better to train them all then feed them lvl 10 materials (which shouldn't be too hard) or just keep feeding lvl 1 materials since the stat gain is minor, but time cost is significant

probably the first right?, but then we come into the later issue of needing to train lvl 90 mounts for a 3x gain. and it gets more complex when you consider they run out of energy so after so long you can only train for so much and you'll be forced to feed lower level materials