No need for the "baby" and "juvenile" notations; a tank's stock should be planned based on the adult size of all the fish. The only time it matters if something is a baby at the time of purchase is if there's a worry that it might not get enough food, or might get eaten by something else. We're planning long-term, given that these fish can live, depending on species, anywhere from 5 to 25 years.
You should probably stick with one pistol shrimp, unless you can buy a mated pair. Same goes for each species of cleaner shrimp. Might skip the peppermint shrimp entirely, as they're fairly hit-or-miss in terms of reef safety. If you don't skip it, make sure you get the right species.
As a general rule, it's best to stick to one goby of each type, i.e. one shrimpgoby (or mated pair of shrimpgobies), one clown goby, and so on. It reduces the possibility of territorial fights. Remember that fish will move, so introducing them on opposite ends of the tank won't necessarily do much.
I can't say I'm familiar with pictus blennies; how certain are you that they can be kept in groups? Again for these, they'll grow, no matter how tiny they are on introduction. They're also fairly pricy, from what I remember, due to being somewhat rarely imported.
You might consider not adding the BTAs. They're something of a hazard with perching fish. Not all fish available for our tanks necessarily have experience with anemones in the wild, and there's always the possibility of even a cautious fish getting startled, darting into the anemone, and being stung or outright eaten.
You should probably stick with one pistol shrimp, unless you can buy a mated pair. Same goes for each species of cleaner shrimp. Might skip the peppermint shrimp entirely, as they're fairly hit-or-miss in terms of reef safety. If you don't skip it, make sure you get the right species.
As a general rule, it's best to stick to one goby of each type, i.e. one shrimpgoby (or mated pair of shrimpgobies), one clown goby, and so on. It reduces the possibility of territorial fights. Remember that fish will move, so introducing them on opposite ends of the tank won't necessarily do much.
I can't say I'm familiar with pictus blennies; how certain are you that they can be kept in groups? Again for these, they'll grow, no matter how tiny they are on introduction. They're also fairly pricy, from what I remember, due to being somewhat rarely imported.
You might consider not adding the BTAs. They're something of a hazard with perching fish. Not all fish available for our tanks necessarily have experience with anemones in the wild, and there's always the possibility of even a cautious fish getting startled, darting into the anemone, and being stung or outright eaten.