lol, wow, that is some wish list. Obvously you know about the Mandarin and what most people will say about it being put in so early, but there is a chance it will be ok.
Horseshoe and Emerald crab.. horseshoe needs a lot of sand area to dig in. I had one a short time, really cool crabs, but I didn't have enough sand/beach area in my tank for him so I gave it to me neighbor. Emerald.. not the most reef safe of crabs, mine used to eat my zoas all day long. Other crabs on your list seem fine. I have had a Sally in my tank for years (well, on my 2nd one now) and they are really cool cleaners but have been known to grab a small fish when they get bigger.
Hippo Tang.. very timid fish and very prone to disease from stress. Personally I wouldn't recommend them. Actually, I would strongly advise against putting any tang in your tank. I have tried, and seen others try time and time again and it has always led to failure in a tank less than 100G. Every time the people that couldn't keep a yellow or purple tang would only put in 1 at a time and from what I have read they really like to be in a group or they stress out. Plus they crap a lot and really can foul up the water. If you do get one I would love to see you prove me wrong and have a healthy tang after a year in your tank.
Cardinals... will be great in your tank, same as the Chromis.
Clowns.. well, pick the ones you want and get a pair. I don't think you will have much luck mixing all those different clowns on your wish list.
4 Line wrasse can get big and are mean and not really reef safe from my reading, I don't have personal experience with that one. I did have a 6 line wrasse and those are really cool fish IMO and was reef safe in my case.
I don't see any Angels or Gobies on your list.. I would look at one dwarf angel if you want one, but as you may have read in the other thread, they are "nippy" fish most of the time. Gobies though.. get a bunch! I love gobies (kind of have to with such a small tank, lol)