It can work. Another not so popular but viable build that people try is Warlock - Onmyoji - Shadowmancer and that is to make use of the Ying Yang Harmony attribute to boost Shadowmancer skills as well. Featherfoot can be used to replace Shadowmancer since it can give the dark boost to Warlock like you said with the Witch Doctor attribute.
Wizards in general do not do very well when bosses move around too much. One problem you may have is Kurdaitcha not hitting bosses when they move away from your skills. Also Kundela Slash has a small AOE so if bosses run away it might also be troublesome to hit. The best way is I guess to learn boss mechanics and know when to use what skill.