Two things come to mind:<br/><br/>1. "The road to hell is paved with good intentions."<br/><br/>2. In D&D, the end never justifies the means. In D&D, the act is all that matters from the perspective of good/evil. Even if the succubus helps us a ton and saves the world from destruction or whatever, summoning, binding, and making a pact with her was still an Evil act. Do enough Evil acts and your alignment changes, regardless of what you use the tool for. In reality, a tool isn't evil. In D&D, it can be, and it can change your alignment and influence your actions.<br/><br/>Also, I would agree if we needed a tank, if we were all straight up damage dealers. But my character is built to be a tank, and has the ability to draw aggro towards him without a problem. Making creatures that tank instead of me makes my job pointless, and it would have been better for me to have made a different character if it were going that way.