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Well mine and Sunny's were both designed by Ethan from AO, so if you are going with him, I believe you will not need any further advice as he will cover all the bases for you. He is the man for these types of jobs!!!
You may have to sacrifice some of the other zoas around them, but you could use kalk paste. Just make sure you turn off all the flow. This is what I have donw in the past to get rid of unwanted palys. There is nothing worse to have in a tank than a fast growing invasive paly.