RTF is a global modification that replaces all towns in the game.

I want one with a hammer and another with a sword. The sword should have spikes on the sides and a skull on the handle, and the hammer should have spikes (thanks to Warhammer for the huge number of models).

Hitting two cells at once is not a bad idea in principle, but it would be better to implement it through a special attack, call it a swift attack, so that the Orc fights one enemy and, with a running start, strikes through two cells.

An alternative Orc won't be in heavy armor; he will be an eastern version of the Cartalian minotaurs-executioners serving the Black Guard.