I would stay away from the euphyllias (hammer, torch, frogspawn) as they are pretty aggressive and will kill most other corals near them. They aren't bad additions, but if you want guaranteed success with easy species, that isn't the direction I would go in. Like some others have said, go with zoas, mushrooms, maybe some leathers, too. Xenia and Green Star Polyps both grow really well, have lots of movement and are borderline pests because they are so hardy.
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