Much better, but keep in mind that from week 5-8 your are making step from 375 to 475, but still there is 3 weeks HARD followed by 1 weeks unload. Adjust as needed.
One thing I would like to suggest, If he is a strength dominant athlete (who is strong but lack RFD) some backward med.ball throws would be awesome to prime the nervous system prior to the deadlift session.
Also, don’t be affraid to add some accessories, post chain work etc…what technique he us using in comp.? mid grip standard or sumo deadlift ?
contest 1x1x500lb , he have only one try? there is 3 try in powerlifting contest
I suggest 1x465 (safe lift) 1x485, 1x500