It may seem like a simple concept, but for most sequencing becomes unnecessarily complex.
Simply sequence when it makes sense to. You want it to be clear to the pilot who they are following. Due to a lack of specific commands to identify aircraft types, you need to make it super clear to the pilot who they are following.
Too early and you’ll confuse the pilot, they may get the wrong information and need to be resequenced. Too late and the pilot will be scrambling. Find the happy medium.