Halichoeres wrasse need a sand bed, or at least a container of sand to burrow in when stressed / to sleep. Please don't put one in a bare bottom tank without a container :). If you're set on more wrasse, consider flashers or the smaller Cirrhilabrus like an isoceles or exquisitus, since you already have a lubbocki. Don't add a six line ;)
More about wrasse types in general:
https://www.reef2reef.com/ams/all-about-reef-safe-wrasses-in-aquaria.28/
Surprised your sticks haven't shown much in the way of problems, much braver person than I! Can't wait to see things flushed out in a year or so, love that rockscape, especially that shelf piece jetty on the left. Was impressed with how the seams looked on the EXT 75 at the local store, was always happy with my fusions.