Anthias are schooling fish. Although I have seen them kept singly, my experience with them was not stellar in singles. They appear to be better off in a school, but a school will require a lot of space in your tank.
As to the angels, I'd go with the Potter's, mainly because of price. (Neither the golden or the Potter's are low-end for dwarf angels.) I also really like the Potter's on a personal note.
I don't have any experience with pipefish, but my impression is that they need to be in almost a species tank with other pipefish and seahorses. I can't imagine that they compete very well with all those others for food.
You's also have to be careful about the hawkfish with the shrimp as they tend to like them - for lunch. The longnose hawk is supposedly a little less prone to going after them.
I've read that dottybacks are also often aggressive towards similarly shaped fish, so if you add one, put it in after your gobies are established. I think most wrasses can hold their own against them though. A less agressive and cheaper alternative is a royal gramma, although they will drive away similarly shaped fish. In my experience they don't really chase like I've heard that a dottyback will. Once the intruder is away from the gramma's hideyhole, they chill out.
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