I don’t know if this is a consideration regarding Clone Cadets/Rookies/Arc Troopers (or even if it’s possible - I haven’t seen the individual episodes outside of Smudger’s movie edit in years) but… could it work as Arc Troopers being the main story with the most important elements and moments of the other two episodes scattered throughout as flashbacks? That way you find the best spot for the episode and don’t need to worry about where to place the others within your timeline.