I wouldn't put any other wrasse in with that devil 6 line. I watched mine kill a newly purchased 5 Bar Mystery Wrasse a couple of years ago. That was just the beginning of the fish it killed. It went on to kill a trio of bartlett Anthias and misc other wrasse after that before I was able to trap it. The 6 line was a model citizen for about 2 years before it went on it's rampage.
Peter do you have ornamental shrimp in the tank? If so stay away from both the five bar and the flame hawk fish. I made the mistake of putting a $200 five bar in my tank and it picks on my shrimps constantly. I happen to like having bunches of cleaner and fire shrimp in my reef.
He'll be up for sale soon. As soon as I can catch him.
P.S. I did a victory dance when my six line went carpet surfing!