• All actors participating in a fight scene are put in to a bucket for each belligerant side they are fighting on.
• Actors within buckets are sorted from highest to lowest initiative and the buckets are sorted by highest initiatives.
• Initiative is then handed out by interleaving the buckets.

The result is that no faction gets back to back turns unless there are no more factions to weave in.

Example

Faction A has someone of initiative 10, 5, and 2.

Faction B has initiatives of 4 and 3.

Initiative will weave to A10, B4, A5, B2, A3.

Slower initiative characters can come before higher ones--initiative only determines your speed within your factional bucket, and buckets are interleaved.