Zack K
The Butterfly Guy
You have everything right that can be expected. Now it just comes to damaged, diseased, and placements. Now I can't tell you too much about those three because it varies with every piece, but here is some general knowledge:
Damage: When you are at your LFS you should always looks for any chunks missing or scars. For the plates look for little to no PE, darkening in the skeleton, and long stringy tentacles. Their may also be some bleaching happening. As for torches, you want to look for bare or dead heads on the skeleton. Also check the perkiness and thickness of the tentacles. Euphyillia tend to inflate when they are very happy.
Disease: After you check for visual damage, then you want to look at the health of the coral. When looking at the Plates make sure it had good polyp extensions and that it is a vibrant color. If it is sick it tends to bleach or turn a brownish grey. Also make sure the mouth looks to be in good shape. Parasites and infections like to target the mouth first. As for the torch check for the vibrant colors. Their is also another big killer called Brown Jelly Disease (BJD). This is when the tentacles literally look like a blob of jelly on the side of a branch. BJD can be difficult to treat.
As for placement: Remember lighting and flow is unique to each piece. These are just a few tricks learned over the years of what these corals generally like. Your plates like the sandbed. It is soft and in lower lights and flow. Make sure their is no air underneath them as it can erode them away over time. Your torches like a moderate to high light and a good amount of flow. Not enough to blow them out of their own flesh but enough to get some movement. Both corals like random flow so if you could get it to bounce off a rock or glass that works great.
Like I said this is all some tips and tricks on what the corals like (IME) I recommend dipping any and all corals upon entering the tank. Quarantine is another excellent idea but I know not everyone has a coral QT
