Eye of slayer/ might be bug

[Makzim]

- Eye of Slayer - Increases P. Atk. toward monsters, magic creatures, Giants and Dragons by 30% for 10 minutes. Not working with skill
charecter Duelist

skill is working with usual melee hits , but not with with skill f.e.
- Sonic Buster - Supplements user's P. Atk. with 457 Power in a powerful burst of energy. Requires a sword, blunt weapon or dualsword weapon whose 2nd energy stage has been recharged. Consumes 3 Energy Stones. Over-hit and critical hit are possible.
i didn't test other skills.

i do not know if other "weakness" skills are bugged also, nor i don't know if this skill doesn't work also for dreadnought AOE skills.
Looking for feedback about skill/bug! tnx