Complex sentence: The session was engineered by Marcus Mackay (Frightened Rabbit), mixed by Iain Cook (of Aereogramme, The Unwinding Hours, Chvrches), and mastered by Kenny MacLeod (Mogwai, Sons and Daughters).
Split into simpler sentences: The session was engineered by Marcus Mackay (Frightened Rabbit). The album was then mixed by Iain Cook (of Aereogramme, The Unwinding Hours), and mastered by Kenny MacLeod (Mogwai, Sons and Daughters).