Lunge should work while riding mobs (+ horse shoes and enchantable armor)

I think that if you are mounted on your horse (or any other ridable mob for that matter), the lunge enchantment should work so that both you and your ride lunge forward while you stay mounted.

Ever since the elytra got added other modes of transportation got mostly overshadowed and are in my opinion in dire need of some love. Elytras are fun, so nerfing them to make horses/minecarts/etc more viable in comparison would be kinda meh. However with the spear, you have the opportunity to give ridable mobs (especially horses) an interesting buff I think.

Instead of horses competing with the elytra in speed or item transportation capacity or whatever, the spear could give them a totally unique role as a combat assistant. If the damage is sufficient, they could be a great early- to mid-game help with fighting mobs, especially now that saddles are craftable (I mean, horses already have armor! It would just fit so well!). Making lunge work while mounted would expand on the spears potential to buff mounts.

Additionally, since this is the "Mounts of Mayhem" gamedrop, horses could get another thing: horse shoes as a second armor slot. These could be enchanted e.g. with frost walker, something to make them faster, maybe also soul speed?

+ enchantable horse (and nautilus) armor? Protection, Thorns, etc. ? Pretty please :c