Makes sense. Considering if everyone dies in the first part at the building of the first bridge with the knights and ogres, the Warlock can self res if he dies and save the whole team by getting to the end and getting everyone rewards. Also, if someone or people die while running from light to light in the beginning, the Warlock can offer to go revive them since they have self res, and if they die they can use it and revive their team members while having no weight of the darkness on them, holding them down.

And that makes it a crutch for people to rely on. Stop saving those people's arses and watch how they start to improve.