I have a level 8 paladin, mounted combatant feat, who will be riding a celestial warhorse via find steed. As level 8, my paladin gets 2 attacks per round. The horse will be fitted with horseshoes of speed, so move of 90.
The example turn I'm considering is the following. The horse moves 30', where I deliver a blow to a creature with a lance, then moves another 60' where I hit with the lance again against a second target. Regardless of if I intend to close to melee, can the horse use the trampling charge feature during one or the other of these attack events? When I move away from the first target, do I invite an attack of opportunity?
I've done some research about mounted combat, and the information I've seen seems to say that a mount must be acting independently in order to use the attack action. A warhorse obtained by the paladin spell find steed has a telepathic link and an intelligence of 6. Is it reasonable that the paladin is working in concert with the horse telepathically to arrange attacks and allowing the horse to execute the orders, "charge the orc ahead of us, then keep moving to the bugbear to the left"...
Specifically, I'm asking if the example turn reflects a correct understanding of the mounted combat rules, and I want to know about how mount attacks and attacks of opportunity work.