Index of the Scribe gives only 17.5% dmg instead of 35%

[compact sonnet]

It only increases skill weakspot damage, not Skill damage in general. The base damage stays untouched while the weakspot bucket receives the bonus. So if you do 1404 base skill damage and another 1404 as weakspot bucket, then only the latter will get 35% increase. So in your case you do 1404 base skill damage + 1.35xWeakspot damage= 1404+1.35x1404=3299

its working as intended.

@unique steppe

[unique steppe]

Thanks for explaining, from your formula I see it's because crit bonus does not apply to weakspot bonus.