The main problem will be with water quality: you will have to feed around 1/4 teaspoon of the microfood during the day. If Saphire skimmer will be able to handle this - then good.
You always can make areas of higher flow, using small powerheads.
Using the small colonies will help to keep the number of mouthes to feed to a minimum. The big colony always can be fragmented to the small, and what was left - given to somebody else.
Tubastrea is quite hardy, but it should be fed at twice a week by meaty defrozen food, like mysis, Ocean Plankton, shopped raw grocery seafood - without salt or presevatives. Washing it before using will help with water quality.
The sun coral is usually available in 3 colors: orange-yellow, lemon-yellow, black (very dark brown) and the 4th - the brown with long branches, is more rare. If your supplier is not a chain store, there is a good chance to find the relatives of sun coral, in pinkish color.
Very few heads of each - and you will have quite a variety in your tank.
One restriction - they should be placed on the rock, where the food will not drop inside the rock branches. Otherwise it may rot there.
I don't have
Menella gorgonian, but after it I would place
Swiftia and
Diodogorgia.
Swiftia - if you will not bruise it by basted debris during cleaning.
It's more bright in the light, S. kofoididi is a glowing tangerine color, S. excerta - yellow with red polyps (but sick S. kofoidi will look the same color, it recovered well in my case).
Diodogorgia - red or yellow finger gorgonian, with white (actually transparent) polyps, so large, that you will be able to see the process of eating, with some magnification or photo camera with macromode.
Vertically shaped are more durable, in my humble experience, but of course I don't have a statistics
.
Scleronephthya and chili coral will likely to be problematic - the amount of flow and feeding, particularly small food for one, and variety of different kinds of food - for another. Plus chili doesn't like light very much, IMHE again.
Tube anemone: I'm in love with them, hardy, feed them just as a fish, but they:
- may grow to a very big size, and I don't know, how to recognize the smaller varieties. Already asked about it.
- will require the PVC tube with the finest sand, as a replacement of a deep sand bed - they bury their bodies there.
- require low flow - practically impossible in the same tank with scleros.
- the fish should have place to swim around it, without touching. The same "no contact" rule - for corals.
- in the store they may look 2.5 times smaller, that in tank. I planned one amount of space for mine, and had to do reaquascaping to find the place for it. In low flow, not anywhere
Even with all of this - it was the best buy for a money, ever.
HTH