I would be wary of the reaction from the C. scottorum, they are among the most aggressive towards other cirrhilabrus. How is it's colouration and behavior been towards the laboutei?
The lineatus is about average but the isoceles is generally regarded as one of the least aggressive cirrhilabrus there are.
Do you have an acclimation box? Are both the new wrasse going to be males, females? Quite a few intersection points where behavior can be quite different. They are at least all from different cirrhilabrus complexes, which is a good thing.
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