Blazer rust tips (floor/rocker boxes)

[Bagd72Chevy]

This is kind of my thoughts, if you guys could help me understand the order of work I would appreciate it. I'm going to help my buddy fix his 1972 Blazer. Someone cut the rocker boxes off and never put back. Rockers are new but not done right. Rear floor is bad. Bedsides are good with small spots that are easily fixable. Tailgate is good, have rust free doors and fenders for it.

Replace:

Rear Cargo Floor
Rocker Boxes
Rockers

Unsure at this moment whether I will repair or bulk replace the front floor section. Any input on where to draw the line were replacing the whole thing is better than patching?

My plan is to remove the rockers, bed sides, cargo floor, what's left of rocker boxes.

What order should it go back together? I've done trucks and burbs but haven't messed with a rocker box before. Is the rocker box also the inner rocker?

Thanks guys,
Ryan