Human Strengths

Humans are my favorite race. They have stronger Archers, better spells, Paladins, and better looking ships (heh).

The Elven Rangers Marksmanship upgrade makes them have 3 extra points of damage. This is much better than Regeneration. If you want your rangers healed, use Healing.

Human Mages have the best spells in the game. Polymorph instantly kills any unit. Slow stops attackers. Flame Shield can be used on a lone ballista to protect it from marauding Grunts. Mages aren't undead, so they will not be harmed by Exorcism.

Paladins are the fastest units in the game. Healing can bring back almost any units health to full with a casting. This can be invaluable when you are constantly attacked and need your troops alive. Exorcism can kill off pesky Death Knights and Skeletons that bug your troops.

Although this is really an advantage, the Human ships look better. Sleek Elven Destroyers would be much more feared than Troll Junk Heaps.