Complex sentence: A variation described as a "West Coast Version" ranks the combinations differently, with 4-5-6 being best, then ranking pairs according to the highest pair (ignoring the singleton), then treating all "trips" as an instant loss.
Split into simpler sentences: A variation described as a "West Coast Version" ranks the combinations somewhat differently. It ranks pairs according to the highest pair, ignoring the singleton (as described immediately above), then treats all "trips" as an instant loss.