Potential Paths: Path 1: Nolej AI is a software that creates assessments, activities, and interactive learning elements from pre-existing content. While the product doesn't explicitly state AI is used in assessment or grading, it does create assessments through AI technology. This product would require perceptive understanding of assessments by the user to use it effectively. Path 2: Both MagicSchool AI and Enlighten AI offer AI-enhanced features. MagicSchool AI focuses on creating assessments and educational content, while Enlighten AI expedites the grading process by providing draft suggestions for grades and feedback based on the educator's past grading habits. A combination of these products can provide a comprehensive AI-integration into the assessment process; from creation to grading.

Final Narrative: To harness AI in both creation and grading of assessments, you can opt for two tools - MagicSchool AI and Enlighten AI. Start by using MagicSchool AI for creating assessments in line with your curriculum and learning objectives. MagicSchool AI uses AI to generate customized assessments, saving you considerable time in the planning and creation phase.

Next, use Enlighten AI to automate grading. This tool uses machine learning to understand and mimic your grading style, which facilitates the grading process by offering draft suggestions for grades and feedback. This significantly reduces grading time, and ensures consistent and fair evaluation standards across all submissions.

Finally, remember to provide feedback to both systems regularly, to train their AI models for improving the accuracy and relevance of both assessments and grading. These combined features of MagicSchool AI and Enlighten AI will not only simplify your assessment process but also contribute to a more personalized and effective learning experience for your students.