Sounds good. I will try that. I havent swum a swimming meet or anything like that in a really long time. So no clue how fast I could go for the 100m. In practice we did a 50m all out in spring and I did a 29,xx I guess. With start form the blocks.
The set sounds good especially since the first 200m are very very important in the mass start events. If you are in front at the first buoy and catch good feet, the swim isnt that hard anymore in my experience. But if you are stuck behind because your start is slow, it becomes hell against 50-80 other triathletes that are similar in strenght

Those are great times btw. I am envious for your 400m times.