Let's say you have someone riding an elephant... how does it work?
1) Considering that that an elephant takes a 3-by-3 square area, or 15ft., where's the rider? On a horse, he's on the back, but on an elephant... is he on the middle?
2) How does that same rider even attack? An elephant has a 10-ft reach, meaning that even with a lance, the rider cannot attack unless the opponents are directly in front of the elephant. But wait, what about height? Ok, an elephant isn't 15-foot tall, but still. If the rider sits in the middle of an elephant's 15ft. area at say 10 feet high, does this mean he can only attack opponents on the ground, and sides, using reach weapons? The way I see it, the rider cannot use a non-reach weapon unless the opponent is Large or larger.
3) Any way to make these problem easier to solve? I... can only see a polearm master fighter using a sarissa, which is a 15-foot long spear presented in the Giant Hunter's Handbook... or using a ranged weapon, but still, I'm looking for melee combat tips as well.
The reason I'm asking this is simple: you can fight NPCs on the back on elephants or triceratops (regular war mounts, not companions) or you can end up fighting or becoming a Mammoth Rider, which has a Huge mount. How do you use them effectively?