It's an extremely fringe (and, IMO, wrong) theory that your instincts "cycle" with your tritype. You don't just randomly choose instincts; these people believe that your core has one stacking and that stacking loops.
Using my own as an example:
6w7 sp/sx/so - 1w9 sx/so/sp - 4w5 so/sp/sx
Using yours as an example:
4w5 so/sp/sx - 6w7 sp/sx/so - 9w1 sx/so/sp
As I said, I, and most people, think this is outright wrong - you have one stacking, period. That stacking applies to your whole type. Done. Instincts aren't just something you go through, it's something so embedded you struggle to shift your focus from.
Then again, I also think most people focus way too much on tritype, and this is probably a symptom of that, but whatever.