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

I think that the preparation bonus should be given to a race with uniform monsters, but with the Lizardmen, it will turn out badly:
Gnoll = Lizard Archer = Lizard Warrior = creatures of levels 5 and 6

If humans receive a bonus to defense, then all these bright effects should be removed, and an adequate name should be given to the skill, such as "Reinforced Position," but they will be vulnerable to Holy Word with this skill.