From what I can tell this should carry any caster/beast master player through the quest. But it's not optimized for a certain player build, sacrificing speed for universality. -1 in effectiveness for this.
Posted a non-BiP backline in the talk page just in case someone might need such.
The build works well and the quest can be done easily. It is very important to follow the additional instructions provided in the guide about the ritualists and to never attack more than one group of enemies at the same time.