Yes, that makes sense, but this is already the fourth immune creature. In that case, it’s better to remove the darkness resistance from the Titans.
Regarding the Sorceresses: what is the imbalance? Yes, they have carts, but it’s very strange that they run out of shots when they shoot without ammunition. I meant magical archers (Titans are not Sorceresses either).
You can use a mace, but they have a bone-crushing club.
ColouredText - список заклинаний и их уровень в описании существ-колдунов