You can always bring them back to the store if they misbehave. Really, the order you have them in is the order I would introduce them in. Again, that could all be for naught. Just have a plan if things don't work out, like returning misbehaving fish or get acquainted with a reef or marine fish club in your area, if any, to rehome.Do you recommend a specific order of adding these fish to minimise behavioural issues like aggression? Honestly, I don't foresee myself being able to accommodate unsuitable tankmates in another tank so I hope to avoid stock issues entirely