I think that sums it up nicely, Duncan.
You have to think about what your prey are likely to be feeding on.
For example. when fishing a wreck if the tide is running the bait fish will seek shelter from the tide and so will be close to or in the wreck, so this is where you'll find the cod and pollack. During slack, the bait fish venture away from the wreck and you will often find the Pollack quite a way off the wreck (higher).
If fishing for Bass, depending where you are, you usually need quite a strong tide to get them feeding. For example. the Races at Portland Bill only fish when the tide is faster than 2knts. Why?? Because during the tidal flow the sandeels they are feeding on get caught by the tide and are tumbled over the rocky outcrop and pop out of the maelstrom in a confused state and are readily taken by the waiting Bass downtide of the rock. During slack water the sandeels will bury themselves in the sand.
Rays can be caught on any state of tide. Why? They can hunt by scent and vibration, so will move over a sandbank at slack water and sense any buried prey
(sandeels or worms). They can also fish by sight, and will lay in waiting on the downtide side of a bank waiting for their prey to come tumbling towards them.
That's my take on it, anyway.
Think fish!!
BF