When constructing the rock work of a tank, I think about accessibility to the inside, caves, and shelves. Accessibility will make you go mad, but it's worth the extra effort in the long run. You want to be able to get to any area of the tank inside with the least amount of disturbance. You want to be able to grab out a dead fish if he dies behind a rock in the back. You want to be able to get to any equipment that is inside the tank and remove things easily. You also want to make it so that areas won't stagnate due to low water movement. What I do is frequently snake my arms through what I have set and make adjustments as I go along. There will obviously be areas that are tight, but so long as you can use a set of tongs to help, then it's still accessible.
For best viewing, you would probably like a step type set up instead of a slope. Same perspective, but with more placement areas for coral. Make the caves flat on top. A set of caves on the bottom supporting a higher set of caves against the back. Leave space for a water pump to circulate water through the back so that area doesn't stagnate.
Once the rock work is how you want it...try to keep it that way. Moving coral around a lot can stress them. The flesh, mantles and skeletons of LPS
and clams are fragile and easily bruised and broken. Avoid leaning the coral's flesh against anything and give each their space. They can lay themselves along the rocks, but any pressure on them can injure them. Use Stress Coat on your hands or use plastic wrap or gloves to handle the corals...if not for your own safety of being stung...at least for their safety from the acids on your fingers. Same for soft coral as well. I use cut fish bags to pick up and wrap coral people buy. It's a sound request to make to your LFS
if they don't already do it.
This link goes to a good product that I've found very successful in helping to mend damaged coral. It's a simple and safe dip to use. Whenever there are stony coral touching, or have fallen, or somehow torn this stuff will help keep out infectious bacteria so the coral can heal. It's like a band aid.
Placements for coral would depend on their light requirements and their aggressive behavior. The higher the light requirement the closer they should be to the light. Lower light coral can be situated along the bottom and edges of caves. Clams should always be put in an open sandy area. LPS
coral should never be able to touch each other and leave enough room for sweeper tentacles. I don't know what harm if any if two of the same species of LPS
were to touch, but definitely those of separate species would be absolute chemical warfare. Some soft coral are well tolerable to others, but some are not like hairy mushrooms.