Silas was more than ready to face Daniel and his circus. He told Luna to continue monitoring every single one of them and to report their movements back to him.
He also told her to tighten the security around his family. He wants to make sure that his Dad, Kim and Alex doesn't get caught in the crossfire.
Another reason why he asked Luna to tighten the security around his family is because of a bad premonition he has and also his understanding of Daniel's character.
Silas knew that what Daniel wants is revenge. He wants to avenge everything that Silas did to him, from his father being sentenced to death, to the crash of their family's company. From his understanding of Daniel's character, he knew that he would use any means even sinister ones to achieve his goal. But Silas wasn't worried as Daniel was definitely in for a lot of surprises.
