I like to intercut within a chapter when all the elements converge - jumping between concurrent action. My current work called for a strict 3rd Person protagonist POV (limited), the first time I'm writing in protagonist-only POV, which calls for single threading. It's tough, and toucher than 1st person POV, and the work is the first book of a trilogy ad at 600 pages for Volume one, I am learning and employing dozens of new techniques to engage the reader with a variety of structures which approximate the same tonalities as the forbidden fruit (switching to another characters POV - not head hopping, but varied scenic POV's all 3rd person limited - and the ever popular 2nd person elegaic POV). One technique I tried was parenthetic narration, which allowed me to maintain my paraochial key signature POV for the piece and sweep tnagential material into the reader's pervue via the protagonist's mental roving. It's work, but it satisfied when its successfully brought off. It's like cheating on a diet and still losing the weight.
Edward C. Patterson