Interesting!
I'd prob do LP for 3 months with a moderate amount of weight gain. Probably capping it at 6kg or so.
For the next 12 weeks I would probably do something like RFL for 12 weeks if he can stand it. Training wise, I'd probably do something more like an Intermediate LP for hypertrophy that I've been working on, mainly for the caloric burn and nutrient partitioning whilst running RFL. The skeleton looks like:
Day 1:
Squat x 6 @ 8, then 12 min AMRAP at same load in sets of 3
Press x 6 @ 9, then 12 min AMRAP at same load in sets of 3
Chins -10 min AMRAP
Arms- 10 min AMRAP
Prowler
Day 2: off
Day 3:
Deadlift x 6 @ 8, then 12 min AMRAP at same load in sets of 3
Bench x 6 @ 9. then 12 min AMRAP at same load in sets of 3
Pull ups- 10 min AMRAP
Arms -10 min AMRAP
Steady state cardio PRN
Day 4: Off
Day 4:
Paused squat x 6 @ 9, then 12 min AMRAP at same load in sets of 3
Incline Bench x 6 @ 9. then 12 min AMRAP at same load in sets of 3
Pendlay Rows- 12 @ 9, then 12 min AMRAP at same load in sets of 6
Arms-10 min AMRAP
Prowler