From your second block on the participants have a budget at their disposal for personal mentoring, which they manage in deliberation with the co-ordinators. With this budget they can select artists, theoreticians or practicians that can have an important input in (a part of) their research.
It is important that they are alert to the importance their chosen personal mentors may have for other participants. They can propose to share personal mentors with others and thus reduce the impact on their personal budget. If they consider that the practice of the artist / theoretician / practician can be relevant for a larger number of participants, they can propose to invite him for a workshop and / or as dedicated mentor.