this is one of our bonus experiments, but should answer this question. purpose: to find out how cha affects skill damage of othell adventurer and yul archer. attacker 1 (yul): all skills learnt, equipped with amaranthine thrower, eternal jewelry set, plain light eternal set. attacker 2 (othell): all skills learnt, equipped with amaranthine shaper, eternal jewelry set, plain light eternal set. target: all skills learnt, no equipment. experiment: yul sagittarius and othell adventurer deal damage on feoh storm screamer wih plain attacks and skills (quick shot and reverse). after each hit we increased cha by 1 ranging from 41 to 56. yul sagittarius othell adventurer conclusion: as you can see from the results of the experiment, charisma increases all character’s characteristics, including his damage. unfortunately, the increase can hardly be called significant, as upon increasing cha by 17 points, yul’s plain attack damage increased only by 3%. the increase of skill damage is also very slight. in this experiment, we did not show how casting spd. and m. atk. are affected by cha, as they are not important for physical damage dealers. however, their increase from cha is not any different from other characteristics.
you should add that is kinda waste of money also giving useless stats, even a single augment is better :d