Notice that unlike normal combat against an adjacent target, a lance can be used for pounding without any penalty even when the wielder is not mounted.
Pounding is an excellent strategy for hitting both melee and ranged targets; if you have at least Skilled level with speed you can attempt to kill a group of opponents at a choke point (such as a door) a knight's move away. If you plan on pounding in corridors, though, you will need a light source, as you cannot pound a monster you cannot see (even if you can detect it via other means).
In addition, pounding does not trigger passive attacks, meaning you can use it as an infinite source of safe attacks against dangerous creatures without worrying about running out of projectiles or wand charges.
Most monsters can only use polearms with a skill level equivalent of unskilled. Trolls, however, can use them with a skill level equivalent of skilled, meaning they can hit you from a Knight's jump away.