That would be the tricky part. The timing is completely up to the environmental factors at play at that time. What may work in the morning may not work in the afternoon. What may not work in the morning might be something you can do in the afternoon. The specific time would be dictated by a lot of variables. As the years (okay, decades for some of us) went on, it is almost like a 6th sense. You can tell it is time to get out. It’s a whole combination of things you see and hear, when enough stack up - you know.
This is not a direct frontal assault. In the example above, the fire is west and south of the control line and the forces are operating north and east of that control line, in the yellow area.
Since they were trying to keep the fire from crossing 395 and it did cross in several places, and the VIIRs had significant heat, based on your map I thought that looked a lot like a frontal assault. That is where most of the spots would be found. In other areas of the fire the tactic in question, although it may not be necessary, would be far more achievable.