It was much simpler for me to be motivated in joining the raid. I jumped through the spider pit into the underdark first, then went to grymforge, found Nere, who told me (well, his corpse told me) that Minthara knows a way to the Moonrise Towers. Therefore I went to the camp and made a deal with her: I help with the raid, she helps with the passage. She later turned on me and I bashed her head. Who is evil here and who is not?
I am evil from the tieflings' perspective. I am not evil from my perspective. I am evil from Minthara's perspective, but for the whole different reason of being a problem to the Absolute, which she is devoted to.
There is no thing like evil in a vacuum, there is no universal definition of evil. It is about how your character or another character perceive themselves. This is up to you to decide. Allignment system is not a universal solution to building and progressing your character. Also it does not oblige you to self identify yourself as evil, neutral or good. It does not oblige your character to act evil if he is evil in alignment. This is the definition of character development. In the end the topic is not about an evil path, but about more options to choose from, to properly develop your character's personality, in a way that will feel organic to a player. So there is no real need to evaluate the evilness of things.
