This is my setup.
The rain head is on it's own valve with 3/4 pex lines running to the valve, and up to the head. It pours out It's a 12" Kohler. I forgot the delta 14"was on backorder for months so we found one comparable. The rest is off a 3 way diverter. The body sprays are Kohler 4". I put my top one a bit high. It's at 6' to the top of it. I should've put it 6" lower and the middle one 6" lower, but left the lowest. It works great for me, but anyone shorter doesn't like them as much. The regular shower head is a delta. Then there's the wand.
On mine i can turn on 3 fixtures at a time as long as the rain head is one of them. You get pretty fuckin wet. No worries about soap staying anywhere. We also have an on demand water heater, so it's hot as long as we have propane.