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

Or make Gnolls melee units and Goblins ranged units (let them throw stones like they do on towers).

Added 1 minute ago

It would be better to make an Elven race.

Actually, I initially (when I first had the idea to create such a mod) wanted to make the usual races: Orcs, Humans, Dwarves, Elves, etc.

Added 1 minute ago

1. Gnoll (melee)
2. Lizard (ranged)
3. Orc warrior (wolves don't live in the desert)
4. Shaman
5. Basilisk
6. Wyvern
7. Cyclops

I wanted to make it so that the Orcs had as few beastmen as possible and as many Orcs as possible (Trolls, Ogres, Goblins, Orcs, Cyclops).