Im sure most, if not all, of us agree that getting more cross class skills makes everything easier. But single class CUL would probly be the best single class to go. As a single class youd be able to put your specialist on, so youd get byregots miracle(rather then blessing). You get versions of careful, manipulation, waste not(via prudent), and rapid. With all your tricks, 1 star should be doable.
WAY late edit: Almost forgot, CUL is also in a great position because it has SH 2 be default, and Muscle Memory is a great level 54 skill. But yeah, having everything is nice too. Thats why i leveled em all.