Dashing before a charge to increase damage. This would be increased further if you dash multiple times in a straight line with Outcry of Steel. Arials and cloud giants could gain the same momentum without dashing by falling from above in any outdoor room.

Strong, large races can stun the victim of their charge for a round.

Quick races can recover more quickly from a charge.

On a failed charge attempt against a hurt opponent, murder instead.

Shield cleave with a polearm.

Legsweep everyone grouped with your target if you're a size or more larger than all of them.

Hobbling legsweep that slices at the legs if you're a size or more smaller than your target. Better damage and increases movement lag for an hour.

Distance drains opponent's movement in natural terrain which is familiar to the defender. Dwarves in mountains, or wood-elves in forests, for example. Works better with more wilderness time.

Take advantage of the round where an enemy's weapon is entrapped with elbow and knee strikes, or more vicious claw attacks for felar.

Use intelligence instead of size difference for distance with smart races.