Finishing Novice Gains

My  brother is starting to spin his wheels a bit on on a 5x5, 3 day a week program (Ice cream fitness 5x5) and wondered which Sheiko would be most optimal to start him on. He has been training for just over a year and is around 70Kg at 5'10" and almost 18 yo (so still has a decent amount of size to gain). His current lifts are stalling around:

Squat - 130Kg x 5
Pause Bench - 70Kg x 5
Deadlift (conv) - 152.5Kg x 5

Thanks for your advice in advance.

3-day <80kg program

Awesome, thanks!